A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6937560 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 252 280 315 360 420 504 630 840 1,260 2,520 2,753 5,506 8,259 11,012 13,765 16,518 19,271 22,024 24,777 27,530 33,036 38,542 41,295 49,554 55,060 57,813 66,072 77,084 82,590 96,355 99,108 110,120 115,626 123,885 154,168 165,180 173,439 192,710 198,216 231,252 247,770 289,065 330,360 346,878 385,420 462,504 495,540 578,130 693,756 770,840 867,195 991,080 1,156,260 1,387,512 1,734,390 2,312,520 3,468,780 and 6,937,560, with no remainder.
Since 6,937,560 cannot be divided by just 1 and 6,937,560, it is not a prime number.