Q: Is 1,601,660 a Prime Number?
A: No, 1,601,660 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 1601660 can be evenly divided by 1 2 4 5 10 20 53 106 212 265 530 1,060 1,511 3,022 6,044 7,555 15,110 30,220 80,083 160,166 320,332 400,415 800,830 and 1,601,660, with no remainder.
Since 1,601,660 cannot be divided by just 1 and 1,601,660, it is not a prime number.