A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8167446 can be evenly divided by 1 2 3 6 7 9 14 17 18 21 27 31 34 41 42 51 54 62 63 82 93 102 119 123 126 153 186 189 217 238 246 279 287 306 357 369 378 434 459 527 558 574 651 697 714 738 837 861 918 1,054 1,071 1,107 1,271 1,302 1,394 1,581 1,674 1,722 1,953 2,091 2,142 2,214 2,542 2,583 3,162 3,213 3,689 3,813 3,906 4,182 4,743 4,879 5,166 5,859 6,273 6,426 7,378 7,626 7,749 8,897 9,486 9,758 11,067 11,439 11,718 12,546 14,229 14,637 15,498 17,794 18,819 21,607 22,134 22,878 26,691 28,458 29,274 33,201 34,317 37,638 43,214 43,911 53,382 64,821 66,402 68,634 80,073 87,822 99,603 129,642 131,733 151,249 160,146 194,463 199,206 240,219 263,466 302,498 388,926 453,747 480,438 583,389 907,494 1,166,778 1,361,241 2,722,482 4,083,723 and 8,167,446, with no remainder.
Since 8,167,446 cannot be divided by just 1 and 8,167,446, it is not a prime number.