A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6075936 can be evenly divided by 1 2 3 4 6 8 9 12 16 17 18 24 32 34 36 48 51 68 72 73 96 102 136 144 146 153 204 219 272 288 289 292 306 408 438 544 578 584 612 657 816 867 876 1,156 1,168 1,224 1,241 1,314 1,632 1,734 1,752 2,312 2,336 2,448 2,482 2,601 2,628 3,468 3,504 3,723 4,624 4,896 4,964 5,202 5,256 6,936 7,008 7,446 9,248 9,928 10,404 10,512 11,169 13,872 14,892 19,856 20,808 21,024 21,097 22,338 27,744 29,784 39,712 41,616 42,194 44,676 59,568 63,291 83,232 84,388 89,352 119,136 126,582 168,776 178,704 189,873 253,164 337,552 357,408 379,746 506,328 675,104 759,492 1,012,656 1,518,984 2,025,312 3,037,968 and 6,075,936, with no remainder.
Since 6,075,936 cannot be divided by just 1 and 6,075,936, it is not a prime number.