Q: Is 1,661,624 a Prime Number?
A: No, 1,661,624 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 1661624 can be evenly divided by 1 2 4 8 229 458 907 916 1,814 1,832 3,628 7,256 207,703 415,406 830,812 and 1,661,624, with no remainder.
Since 1,661,624 cannot be divided by just 1 and 1,661,624, it is not a prime number.