Q: Is 664,000 a Prime Number?
A: No, 664,000 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 664000 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 83 100 125 160 166 200 250 320 332 400 415 500 664 800 830 1,000 1,328 1,600 1,660 2,000 2,075 2,656 3,320 4,000 4,150 5,312 6,640 8,000 8,300 10,375 13,280 16,600 20,750 26,560 33,200 41,500 66,400 83,000 132,800 166,000 332,000 and 664,000, with no remainder.
Since 664,000 cannot be divided by just 1 and 664,000, it is not a prime number.