The purpose of this study is to assess the pharmacokinetics (PK), safety, and tolerability of BPN14770 in participants with severe renal impairment and those with normal renal function.

Inclusion Criteria:

All Participants:

• Considered to be healthy (for healthy participants) or medically stable (for participants with renal impairment), as determined by medical evaluation including medical/surgical history, physical examination, clinical laboratory tests, vital sign measurements, and 12-lead electrocardiogram (ECG) during the screening period and upon admission to the clinical research unit (CRU).
• Body weight ≥ 50 kilograms (kg) and body mass index (BMI) within the range 18.5 to <40.0 kg/square meter (m^2) (inclusive)

Participants With Renal Impairment:

• Participants that are not undergoing hemodialysis and have severe renal impairment based upon their 2021 chronic kidney disease epidemiology collaboration (CKD-EPI) creatinine formula creatinine clearance estimate (CLcr) estimated glomerular filtration rate (eGFR) estimate and the participant's body surface area (BSA) calculated at the screening visit

  a. Severe renal impairment: eGFR <30 milliliters (mL)/minute (min)

• A stable medication regimen is required, defined as not starting new drug(s) or changing dosage(s) within 14 days prior to administration of study intervention through the follow-up/early termination visit.

Healthy Participants:

• Participants with clinical laboratory tests within normal reference range for the laboratory, or abnormal but considered not clinically significant by the investigator. Renal function, calculated by 2021 CKD-EPI creatinine formula and the participant's BSA, must be normal (that is, eGFR ≥90 mL/min)
• Matched to each participant with severe renal impairment with respect to sex, age (± 10 years), and BMI (± 10%)

Exclusion Criteria:

All Participants:

• History or presence of/significant history of or current cardiovascular, respiratory, renal, gastrointestinal (GI), endocrinological, hematological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention; or interfering with the interpretation of data in the judgement of the investigator
• Current or chronic history of liver disease or biliary abnormalities (except for Gilbert's syndrome or asymptomatic gallstones)
• History of GI surgery including but not limited to gastric resection and/or intestinal resection that resulted in a clinically significant abnormality in GI function
• Lymphoma, leukemia, or any malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years
• Participants with fluctuating or rapidly deteriorating renal function. Assessment of the stability of the participant's renal function will be determined by the investigator.
• Any condition requiring medication and/or other treatment other than protocol-specified medication for participants with renal impairment, such as dietary restriction and physical therapy
• Participant with poor venous access
• History of Coronavirus Disease 2019 (COVID-19) infection within 14 days prior to the screening visit or admission to the CRU, or close contact with a COVID-19 patient in the 14 days prior to the screening visit or admission to the CRU as reported by the participant and the participant's medical history.
• Sensitivity to the study intervention, or components thereof, or a drug or other allergy, including food allergy, that in the opinion of the investigator or medical monitor contraindicates participation in the study.

Participants With Renal Impairment:

• Participant with acute renal failure or a kidney transplant history or requiring renal dialysis during the study period
• Current or anticipated need for hemodialysis during the study

NOTE: Other protocol-specified inclusion and exclusion criteria may apply.