A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9596880 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 81 90 108 120 135 144 162 180 216 240 270 324 360 405 432 540 648 720 810 1,080 1,296 1,481 1,620 2,160 2,962 3,240 4,443 5,924 6,480 7,405 8,886 11,848 13,329 14,810 17,772 22,215 23,696 26,658 29,620 35,544 39,987 44,430 53,316 59,240 66,645 71,088 79,974 88,860 106,632 118,480 119,961 133,290 159,948 177,720 199,935 213,264 239,922 266,580 319,896 355,440 399,870 479,844 533,160 599,805 639,792 799,740 959,688 1,066,320 1,199,610 1,599,480 1,919,376 2,399,220 3,198,960 4,798,440 and 9,596,880, with no remainder.
Since 9,596,880 cannot be divided by just 1 and 9,596,880, it is not a prime number.