Q: Is 6,643 a Prime Number?
A: No, 6,643 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 6643 can be evenly divided by 1 7 13 73 91 511 949 and 6,643, with no remainder.
Since 6,643 cannot be divided by just 1 and 6,643, it is not a prime number.