Q: Is 321,666 a Prime Number?
A: No, 321,666 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 321666 can be evenly divided by 1 2 3 6 53,611 107,222 160,833 and 321,666, with no remainder.
Since 321,666 cannot be divided by just 1 and 321,666, it is not a prime number.