Q: Is 20,661 a Prime Number?
A: No, 20,661 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 20661 can be evenly divided by 1 3 71 97 213 291 6,887 and 20,661, with no remainder.
Since 20,661 cannot be divided by just 1 and 20,661, it is not a prime number.