Q: Is 420,666 a Prime Number?
A: No, 420,666 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 420666 can be evenly divided by 1 2 3 6 70,111 140,222 210,333 and 420,666, with no remainder.
Since 420,666 cannot be divided by just 1 and 420,666, it is not a prime number.