The number 6,542,550 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 25 30 31 35 42 45 50 62 63 67 70 75 90 93 105 126 134 150 155 175 186 201 210 217 225 279 310 315 335 350 402 434 450 465 469 525 558 603 630 651 670 775 930 938 1,005 1,050 1,085 1,206 1,302 1,395 1,407 1,550 1,575 1,675 1,953 2,010 2,077 2,170 2,325 2,345 2,790 2,814 3,015 3,150 3,255 3,350 3,906 4,154 4,221 4,650 4,690 5,025 5,425 6,030 6,231 6,510 6,975 7,035 8,442 9,765 10,050 10,385 10,850 11,725 12,462 13,950 14,070 14,539 15,075 16,275 18,693 19,530 20,770 21,105 23,450 29,078 30,150 31,155 32,550 35,175 37,386 42,210 43,617 48,825 51,925 62,310 70,350 72,695 87,234 93,465 97,650 103,850 105,525 130,851 145,390 155,775 186,930 211,050 218,085 261,702 311,550 363,475 436,170 467,325 654,255 726,950 934,650 1,090,425 1,308,510 2,180,850 3,271,275 and 6,542,550, with no remainder.
Since 6,542,550 cannot be divided by just 1 and 6,542,550, it is a composite number.