Q: Is 166,566 a Prime Number?
A: No, 166,566 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 166566 can be evenly divided by 1 2 3 6 17 23 34 46 51 69 71 102 138 142 213 391 426 782 1,173 1,207 1,633 2,346 2,414 3,266 3,621 4,899 7,242 9,798 27,761 55,522 83,283 and 166,566, with no remainder.
Since 166,566 cannot be divided by just 1 and 166,566, it is not a prime number.