Q: Is 2,661,500 a Prime Number?
A: No, 2,661,500 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 2661500 can be evenly divided by 1 2 4 5 10 20 25 50 100 125 250 500 5,323 10,646 21,292 26,615 53,230 106,460 133,075 266,150 532,300 665,375 1,330,750 and 2,661,500, with no remainder.
Since 2,661,500 cannot be divided by just 1 and 2,661,500, it is not a prime number.