Q: Is 620,664 a Prime Number?
A: No, 620,664 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 620664 can be evenly divided by 1 2 3 4 6 8 11 12 22 24 33 44 66 88 132 264 2,351 4,702 7,053 9,404 14,106 18,808 25,861 28,212 51,722 56,424 77,583 103,444 155,166 206,888 310,332 and 620,664, with no remainder.
Since 620,664 cannot be divided by just 1 and 620,664, it is not a prime number.