Q: Is 1,664,664 a Prime Number?
A: No, 1,664,664 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 1664664 can be evenly divided by 1 2 3 4 6 8 12 24 139 278 417 499 556 834 998 1,112 1,497 1,668 1,996 2,994 3,336 3,992 5,988 11,976 69,361 138,722 208,083 277,444 416,166 554,888 832,332 and 1,664,664, with no remainder.
Since 1,664,664 cannot be divided by just 1 and 1,664,664, it is not a prime number.