A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6995604 can be evenly divided by 1 2 3 4 6 7 11 12 14 21 22 28 33 42 44 66 67 77 84 113 132 134 154 201 226 231 268 308 339 402 452 462 469 678 737 791 804 924 938 1,243 1,356 1,407 1,474 1,582 1,876 2,211 2,373 2,486 2,814 2,948 3,164 3,729 4,422 4,746 4,972 5,159 5,628 7,458 7,571 8,701 8,844 9,492 10,318 14,916 15,142 15,477 17,402 20,636 22,713 26,103 30,284 30,954 34,804 45,426 52,206 52,997 61,908 83,281 90,852 104,412 105,994 158,991 166,562 211,988 249,843 317,982 333,124 499,686 582,967 635,964 999,372 1,165,934 1,748,901 2,331,868 3,497,802 and 6,995,604, with no remainder.
Since 6,995,604 cannot be divided by just 1 and 6,995,604, it is not a prime number.