Q: Is 667,215 a Prime Number?
A: No, 667,215 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 667215 can be evenly divided by 1 3 5 9 15 45 14,827 44,481 74,135 133,443 222,405 and 667,215, with no remainder.
Since 667,215 cannot be divided by just 1 and 667,215, it is not a prime number.