Q: Is 661,724 a Prime Number?
A: No, 661,724 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 661724 can be evenly divided by 1 2 4 7 14 28 23,633 47,266 94,532 165,431 330,862 and 661,724, with no remainder.
Since 661,724 cannot be divided by just 1 and 661,724, it is not a prime number.