Q: Is 666,606 a Prime Number?
A: No, 666,606 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 666606 can be evenly divided by 1 2 3 6 241 461 482 723 922 1,383 1,446 2,766 111,101 222,202 333,303 and 666,606, with no remainder.
Since 666,606 cannot be divided by just 1 and 666,606, it is not a prime number.