Q: Is 667,405 a Prime Number?
A: No, 667,405 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 667405 can be evenly divided by 1 5 133,481 and 667,405, with no remainder.
Since 667,405 cannot be divided by just 1 and 667,405, it is not a prime number.