Q: Is 16,566 a Prime Number?
A: No, 16,566 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 16566 can be evenly divided by 1 2 3 6 11 22 33 66 251 502 753 1,506 2,761 5,522 8,283 and 16,566, with no remainder.
Since 16,566 cannot be divided by just 1 and 16,566, it is not a prime number.