Q: Is 505,661 a Prime Number?
A: No, 505,661 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 505661 can be evenly divided by 1 13 97 401 1,261 5,213 38,897 and 505,661, with no remainder.
Since 505,661 cannot be divided by just 1 and 505,661, it is not a prime number.