Q: Is 6,640 a Prime Number?
A: No, 6,640 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 6640 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 83 166 332 415 664 830 1,328 1,660 3,320 and 6,640, with no remainder.
Since 6,640 cannot be divided by just 1 and 6,640, it is not a prime number.