The number 6,329,664 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 27 32 33 36 37 44 48 54 64 66 72 74 81 88 96 99 108 111 132 144 148 162 176 192 198 216 222 243 264 288 296 297 324 333 352 396 407 432 444 486 528 576 592 594 648 666 704 792 814 864 888 891 972 999 1,056 1,184 1,188 1,221 1,296 1,332 1,584 1,628 1,728 1,776 1,782 1,944 1,998 2,112 2,368 2,376 2,442 2,592 2,664 2,673 2,997 3,168 3,256 3,552 3,564 3,663 3,888 3,996 4,752 4,884 5,184 5,328 5,346 5,994 6,336 6,512 7,104 7,128 7,326 7,776 7,992 8,991 9,504 9,768 10,656 10,692 10,989 11,988 13,024 14,256 14,652 15,552 15,984 17,982 19,008 19,536 21,312 21,384 21,978 23,976 26,048 28,512 29,304 31,968 32,967 35,964 39,072 42,768 43,956 47,952 57,024 58,608 63,936 65,934 71,928 78,144 85,536 87,912 95,904 98,901 117,216 131,868 143,856 171,072 175,824 191,808 197,802 234,432 263,736 287,712 351,648 395,604 527,472 575,424 703,296 791,208 1,054,944 1,582,416 2,109,888 3,164,832 and 6,329,664, with no remainder.
Since 6,329,664 cannot be divided by just 1 and 6,329,664, it is a composite number.