Q: Is 320,661 a Prime Number?
A: No, 320,661 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 320661 can be evenly divided by 1 3 9 11 33 41 79 99 123 237 369 451 711 869 1,353 2,607 3,239 4,059 7,821 9,717 29,151 35,629 106,887 and 320,661, with no remainder.
Since 320,661 cannot be divided by just 1 and 320,661, it is not a prime number.