Q: Is 666,650 a Prime Number?
A: No, 666,650 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 666650 can be evenly divided by 1 2 5 10 25 50 67 134 199 335 398 670 995 1,675 1,990 3,350 4,975 9,950 13,333 26,666 66,665 133,330 333,325 and 666,650, with no remainder.
Since 666,650 cannot be divided by just 1 and 666,650, it is not a prime number.