Q: Is 661,550 a Prime Number?
A: No, 661,550 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 661550 can be evenly divided by 1 2 5 10 25 50 101 131 202 262 505 655 1,010 1,310 2,525 3,275 5,050 6,550 13,231 26,462 66,155 132,310 330,775 and 661,550, with no remainder.
Since 661,550 cannot be divided by just 1 and 661,550, it is not a prime number.