The number 6,923,664 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 27 31 33 36 44 47 48 54 62 66 72 88 93 94 99 108 124 132 141 144 176 186 188 198 216 248 264 279 282 297 341 372 376 396 423 432 496 517 528 558 564 594 682 744 752 792 837 846 1,023 1,034 1,116 1,128 1,188 1,269 1,364 1,457 1,488 1,551 1,584 1,674 1,692 2,046 2,068 2,232 2,256 2,376 2,538 2,728 2,914 3,069 3,102 3,348 3,384 4,092 4,136 4,371 4,464 4,653 4,752 5,076 5,456 5,828 6,138 6,204 6,696 6,768 8,184 8,272 8,742 9,207 9,306 10,152 11,656 12,276 12,408 13,113 13,392 13,959 16,027 16,368 17,484 18,414 18,612 20,304 23,312 24,552 24,816 26,226 27,918 32,054 34,968 36,828 37,224 39,339 48,081 49,104 52,452 55,836 64,108 69,936 73,656 74,448 78,678 96,162 104,904 111,672 128,216 144,243 147,312 157,356 192,324 209,808 223,344 256,432 288,486 314,712 384,648 432,729 576,972 629,424 769,296 865,458 1,153,944 1,730,916 2,307,888 3,461,832 and 6,923,664, with no remainder.
Since 6,923,664 cannot be divided by just 1 and 6,923,664, it is a composite number.