Q: Is 2,666,216 a Prime Number?
A: No, 2,666,216 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 2666216 can be evenly divided by 1 2 4 7 8 14 28 47 56 94 188 329 376 658 1,013 1,316 2,026 2,632 4,052 7,091 8,104 14,182 28,364 47,611 56,728 95,222 190,444 333,277 380,888 666,554 1,333,108 and 2,666,216, with no remainder.
Since 2,666,216 cannot be divided by just 1 and 2,666,216, it is not a prime number.