Q: Is 661,606 a Prime Number?
A: No, 661,606 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 661606 can be evenly divided by 1 2 11 17 22 29 34 58 61 122 187 319 374 493 638 671 986 1,037 1,342 1,769 2,074 3,538 5,423 10,846 11,407 19,459 22,814 30,073 38,918 60,146 330,803 and 661,606, with no remainder.
Since 661,606 cannot be divided by just 1 and 661,606, it is not a prime number.