Q: Is 266,668 a Prime Number?
A: No, 266,668 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 266668 can be evenly divided by 1 2 4 163 326 409 652 818 1,636 66,667 133,334 and 266,668, with no remainder.
Since 266,668 cannot be divided by just 1 and 266,668, it is not a prime number.