The number 6,601,056 can be evenly divided by 1 2 3 4 6 7 8 11 12 14 16 19 21 22 24 28 32 33 38 42 44 47 48 56 57 66 76 77 84 88 94 96 112 114 132 133 141 152 154 168 176 188 209 224 228 231 264 266 282 304 308 329 336 352 376 399 418 456 462 517 528 532 564 608 616 627 658 672 752 798 836 893 912 924 987 1,034 1,056 1,064 1,128 1,232 1,254 1,316 1,463 1,504 1,551 1,596 1,672 1,786 1,824 1,848 1,974 2,068 2,128 2,256 2,464 2,508 2,632 2,679 2,926 3,102 3,192 3,344 3,572 3,619 3,696 3,948 4,136 4,256 4,389 4,512 5,016 5,264 5,358 5,852 6,204 6,251 6,384 6,688 7,144 7,238 7,392 7,896 8,272 8,778 9,823 10,032 10,528 10,716 10,857 11,704 12,408 12,502 12,768 14,288 14,476 15,792 16,544 17,556 18,753 19,646 20,064 21,432 21,714 23,408 24,816 25,004 28,576 28,952 29,469 31,584 35,112 37,506 39,292 42,864 43,428 46,816 49,632 50,008 57,904 58,938 68,761 70,224 75,012 78,584 85,728 86,856 100,016 115,808 117,876 137,522 140,448 150,024 157,168 173,712 200,032 206,283 235,752 275,044 300,048 314,336 347,424 412,566 471,504 550,088 600,096 825,132 943,008 1,100,176 1,650,264 2,200,352 3,300,528 and 6,601,056, with no remainder.
Since 6,601,056 cannot be divided by just 1 and 6,601,056, it is a composite number.