A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6948585 can be evenly divided by 1 3 5 7 9 15 19 21 27 35 43 45 57 63 81 95 105 129 133 135 171 189 215 243 285 301 315 387 399 405 513 567 645 665 817 855 903 945 1,161 1,197 1,215 1,505 1,539 1,701 1,935 1,995 2,451 2,565 2,709 2,835 3,483 3,591 4,085 4,515 4,617 5,719 5,805 5,985 7,353 7,695 8,127 8,505 10,449 10,773 12,255 13,545 17,157 17,415 17,955 22,059 23,085 24,381 28,595 32,319 36,765 40,635 51,471 52,245 53,865 66,177 73,143 85,785 110,295 121,905 154,413 161,595 198,531 257,355 330,885 365,715 463,239 772,065 992,655 1,389,717 2,316,195 and 6,948,585, with no remainder.
Since 6,948,585 cannot be divided by just 1 and 6,948,585, it is not a prime number.