Q: Is 667,666 a Prime Number?
A: No, 667,666 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 667666 can be evenly divided by 1 2 167 334 1,999 3,998 333,833 and 667,666, with no remainder.
Since 667,666 cannot be divided by just 1 and 667,666, it is not a prime number.