Q: Is 661,437 a Prime Number?
A: No, 661,437 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 661437 can be evenly divided by 1 3 7 9 21 63 10,499 31,497 73,493 94,491 220,479 and 661,437, with no remainder.
Since 661,437 cannot be divided by just 1 and 661,437, it is not a prime number.