Q: Is 16,605 a Prime Number?
A: No, 16,605 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 16605 can be evenly divided by 1 3 5 9 15 27 41 45 81 123 135 205 369 405 615 1,107 1,845 3,321 5,535 and 16,605, with no remainder.
Since 16,605 cannot be divided by just 1 and 16,605, it is not a prime number.