This study is testing a new study medicine which may be used to treat people with type 2 diabetes. NNC0650-0013 is a new medicine, which cannot be prescribed by doctors. The purpose of the study is to see if the new study medicine is safe, and how it works in participants body. Participants will get a single dose of the study medicine either as injection(s) under the skin or into a vein. The injection will be given by the study staff. If participants are chosen to get the study medicine as injections under the skin, participants will either get NNC0650-0013 or placebo (a "dummy medicine" without any active ingredients). Which treatment participants get is decided by chance. Participants will be required to fast overnight 3 times during the study. The study will last between 11 and 17 weeks.

Inclusion Criteria:

• Male.
• Age 18-55 years (both inclusive) at the time of signing the informed consent.
• Body mass index between 24.0 and 29.9 kilogram per meter square (kg/m^2) (both inclusive) at screening.
• Considered to be otherwise healthy based on the medical history, physical examination, and the results of vital signs, electrocardiogram and clinical laboratory tests performed during the screening visit, as judged by the investigator.

Exclusion Criteria:

• Any disorder, unwillingness or inability, which, in the investigator's opinion, might jeopardise the participant's safety or compliance with the protocol.
• Glycated haemoglobin (HbA1c) greater than or equal to 6.5 percent (48 millimoles per mole (mmol/mol)) at screening.

According to the Novo Nordisk disclosure commitment on novonordisk-trials.com.

Sponsor staff involved in the clinical trial is masked according to company standard procedures.