Q: Is 266,666 a Prime Number?
A: No, 266,666 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 266666 can be evenly divided by 1 2 151 302 883 1,766 133,333 and 266,666, with no remainder.
Since 266,666 cannot be divided by just 1 and 266,666, it is not a prime number.