The number 6,575,520 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 19 20 21 24 28 30 32 35 38 40 42 48 56 57 60 70 76 80 84 95 96 103 105 112 114 120 133 140 152 160 168 190 206 210 224 228 240 266 280 285 304 309 336 380 399 412 420 456 480 515 532 560 570 608 618 665 672 721 760 798 824 840 912 1,030 1,064 1,120 1,140 1,236 1,330 1,442 1,520 1,545 1,596 1,648 1,680 1,824 1,957 1,995 2,060 2,128 2,163 2,280 2,472 2,660 2,884 3,040 3,090 3,192 3,296 3,360 3,605 3,914 3,990 4,120 4,256 4,326 4,560 4,944 5,320 5,768 5,871 6,180 6,384 7,210 7,828 7,980 8,240 8,652 9,120 9,785 9,888 10,640 10,815 11,536 11,742 12,360 12,768 13,699 14,420 15,656 15,960 16,480 17,304 19,570 21,280 21,630 23,072 23,484 24,720 27,398 28,840 29,355 31,312 31,920 34,608 39,140 41,097 43,260 46,968 49,440 54,796 57,680 58,710 62,624 63,840 68,495 69,216 78,280 82,194 86,520 93,936 109,592 115,360 117,420 136,990 156,560 164,388 173,040 187,872 205,485 219,184 234,840 273,980 313,120 328,776 346,080 410,970 438,368 469,680 547,960 657,552 821,940 939,360 1,095,920 1,315,104 1,643,880 2,191,840 3,287,760 and 6,575,520, with no remainder.
Since 6,575,520 cannot be divided by just 1 and 6,575,520, it is a composite number.