Q: Is 509,666 a Prime Number?
A: No, 509,666 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 509666 can be evenly divided by 1 2 254,833 and 509,666, with no remainder.
Since 509,666 cannot be divided by just 1 and 509,666, it is not a prime number.