A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6324696 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 36 42 47 54 56 63 72 84 89 94 108 126 141 168 178 188 189 216 252 267 282 329 356 376 378 423 504 534 564 623 658 712 756 801 846 987 1,068 1,128 1,246 1,269 1,316 1,512 1,602 1,692 1,869 1,974 2,136 2,403 2,492 2,538 2,632 2,961 3,204 3,384 3,738 3,948 4,183 4,806 4,984 5,076 5,607 5,922 6,408 7,476 7,896 8,366 8,883 9,612 10,152 11,214 11,844 12,549 14,952 16,732 16,821 17,766 19,224 22,428 23,688 25,098 29,281 33,464 33,642 35,532 37,647 44,856 50,196 58,562 67,284 71,064 75,294 87,843 100,392 112,941 117,124 134,568 150,588 175,686 225,882 234,248 263,529 301,176 351,372 451,764 527,058 702,744 790,587 903,528 1,054,116 1,581,174 2,108,232 3,162,348 and 6,324,696, with no remainder.
Since 6,324,696 cannot be divided by just 1 and 6,324,696, it is not a prime number.