A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8267350 can be evenly divided by 1 2 5 7 10 13 14 23 25 26 35 46 50 65 70 79 91 115 130 158 161 175 182 230 299 322 325 350 395 455 553 575 598 650 790 805 910 1,027 1,106 1,150 1,495 1,610 1,817 1,975 2,054 2,093 2,275 2,765 2,990 3,634 3,950 4,025 4,186 4,550 5,135 5,530 7,189 7,475 8,050 9,085 10,270 10,465 12,719 13,825 14,378 14,950 18,170 20,930 23,621 25,438 25,675 27,650 35,945 45,425 47,242 51,350 52,325 63,595 71,890 90,850 104,650 118,105 127,190 165,347 179,725 236,210 317,975 330,694 359,450 590,525 635,950 826,735 1,181,050 1,653,470 4,133,675 and 8,267,350, with no remainder.
Since 8,267,350 cannot be divided by just 1 and 8,267,350, it is not a prime number.