Q: Is 1,661,984 a Prime Number?
A: No, 1,661,984 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 1661984 can be evenly divided by 1 2 4 8 16 32 167 311 334 622 668 1,244 1,336 2,488 2,672 4,976 5,344 9,952 51,937 103,874 207,748 415,496 830,992 and 1,661,984, with no remainder.
Since 1,661,984 cannot be divided by just 1 and 1,661,984, it is not a prime number.