Q: Is 2,516,661 a Prime Number?
A: No, 2,516,661 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 2516661 can be evenly divided by 1 3 7 9 21 43 63 129 301 387 903 929 2,709 2,787 6,503 8,361 19,509 39,947 58,527 119,841 279,629 359,523 838,887 and 2,516,661, with no remainder.
Since 2,516,661 cannot be divided by just 1 and 2,516,661, it is not a prime number.