The number 6,824,160 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 32 35 36 40 42 45 48 56 60 63 70 72 80 84 90 96 105 112 120 126 140 144 160 168 180 210 224 240 252 280 288 315 336 360 420 480 504 560 630 672 677 720 840 1,008 1,120 1,260 1,354 1,440 1,680 2,016 2,031 2,520 2,708 3,360 3,385 4,062 4,739 5,040 5,416 6,093 6,770 8,124 9,478 10,080 10,155 10,832 12,186 13,540 14,217 16,248 18,956 20,310 21,664 23,695 24,372 27,080 28,434 30,465 32,496 37,912 40,620 42,651 47,390 48,744 54,160 56,868 60,930 64,992 71,085 75,824 81,240 85,302 94,780 97,488 108,320 113,736 121,860 142,170 151,648 162,480 170,604 189,560 194,976 213,255 227,472 243,720 284,340 324,960 341,208 379,120 426,510 454,944 487,440 568,680 682,416 758,240 853,020 974,880 1,137,360 1,364,832 1,706,040 2,274,720 3,412,080 and 6,824,160, with no remainder.
Since 6,824,160 cannot be divided by just 1 and 6,824,160, it is a composite number.