Q: Is 266,661 a Prime Number?
A: No, 266,661 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 266661 can be evenly divided by 1 3 9 29,629 88,887 and 266,661, with no remainder.
Since 266,661 cannot be divided by just 1 and 266,661, it is not a prime number.