Q: Is 15,665 a Prime Number?
A: No, 15,665 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 15665 can be evenly divided by 1 5 13 65 241 1,205 3,133 and 15,665, with no remainder.
Since 15,665 cannot be divided by just 1 and 15,665, it is not a prime number.