The number 6,608,160 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 30 32 36 39 40 45 48 52 60 65 72 78 80 90 96 104 117 120 130 144 156 160 180 195 208 234 240 260 288 312 353 360 390 416 468 480 520 585 624 706 720 780 936 1,040 1,059 1,170 1,248 1,412 1,440 1,560 1,765 1,872 2,080 2,118 2,340 2,824 3,120 3,177 3,530 3,744 4,236 4,589 4,680 5,295 5,648 6,240 6,354 7,060 8,472 9,178 9,360 10,590 11,296 12,708 13,767 14,120 15,885 16,944 18,356 18,720 21,180 22,945 25,416 27,534 28,240 31,770 33,888 36,712 41,301 42,360 45,890 50,832 55,068 56,480 63,540 68,835 73,424 82,602 84,720 91,780 101,664 110,136 127,080 137,670 146,848 165,204 169,440 183,560 206,505 220,272 254,160 275,340 330,408 367,120 413,010 440,544 508,320 550,680 660,816 734,240 826,020 1,101,360 1,321,632 1,652,040 2,202,720 3,304,080 and 6,608,160, with no remainder.
Since 6,608,160 cannot be divided by just 1 and 6,608,160, it is a composite number.