A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6695535 can be evenly divided by 1 3 5 7 11 15 17 21 31 33 35 51 55 77 85 93 105 119 121 155 165 187 217 231 255 341 357 363 385 465 527 561 595 605 651 847 935 1,023 1,085 1,155 1,309 1,581 1,705 1,785 1,815 2,057 2,387 2,541 2,635 2,805 3,255 3,689 3,751 3,927 4,235 5,115 5,797 6,171 6,545 7,161 7,905 10,285 11,067 11,253 11,935 12,705 14,399 17,391 18,445 18,755 19,635 26,257 28,985 30,855 35,805 40,579 43,197 55,335 56,265 63,767 71,995 78,771 86,955 121,737 131,285 191,301 202,895 215,985 318,835 393,855 446,369 608,685 956,505 1,339,107 2,231,845 and 6,695,535, with no remainder.
Since 6,695,535 cannot be divided by just 1 and 6,695,535, it is not a prime number.