Q: Is 5,561,661 a Composite Number?
A: Yes, 5,561,661 is a composite number.
The number 5,561,661 can be evenly divided by 1 3 7 19 21 53 57 133 159 263 371 399 789 1,007 1,113 1,841 3,021 4,997 5,523 7,049 13,939 14,991 21,147 34,979 41,817 97,573 104,937 264,841 292,719 794,523 1,853,887 and 5,561,661, with no remainder.
Since 5,561,661 cannot be divided by just 1 and 5,561,661, it is a composite number.