Q: Is 666,629 a Prime Number?
A: No, 666,629 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 666629 can be evenly divided by 1 37 43 419 1,591 15,503 18,017 and 666,629, with no remainder.
Since 666,629 cannot be divided by just 1 and 666,629, it is not a prime number.