The number 6,553,710 can be evenly divided by 1 2 3 5 6 9 10 15 18 27 29 30 31 45 54 58 62 81 87 90 93 135 145 155 162 174 186 243 261 270 279 290 310 405 435 465 486 522 558 729 783 810 837 870 899 930 1,215 1,305 1,395 1,458 1,566 1,674 1,798 2,349 2,430 2,511 2,610 2,697 2,790 3,645 3,915 4,185 4,495 4,698 5,022 5,394 7,047 7,290 7,533 7,830 8,091 8,370 8,990 11,745 12,555 13,485 14,094 15,066 16,182 21,141 22,599 23,490 24,273 25,110 26,970 35,235 37,665 40,455 42,282 45,198 48,546 70,470 72,819 75,330 80,910 105,705 112,995 121,365 145,638 211,410 218,457 225,990 242,730 364,095 436,914 655,371 728,190 1,092,285 1,310,742 2,184,570 3,276,855 and 6,553,710, with no remainder.
Since 6,553,710 cannot be divided by just 1 and 6,553,710, it is a composite number.