Q: Is 67,780 a Prime Number?
A: No, 67,780 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 67780 can be evenly divided by 1 2 4 5 10 20 3,389 6,778 13,556 16,945 33,890 and 67,780, with no remainder.
Since 67,780 cannot be divided by just 1 and 67,780, it is not a prime number.