Q: Is 646,659 a Prime Number?
A: No, 646,659 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 646659 can be evenly divided by 1 3 9 13 39 117 5,527 16,581 49,743 71,851 215,553 and 646,659, with no remainder.
Since 646,659 cannot be divided by just 1 and 646,659, it is not a prime number.