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**777is an odd number**,as it is not divisible by 2

The factors for 777 are all the numbers between -777 and 777 , which divide 777 without leaving any remainder. Since 777 divided by -777 is an integer, -777 is a factor of 777 .

Since 777 divided by -777 is a whole number, -777 is a factor of 777

Since 777 divided by -259 is a whole number, -259 is a factor of 777

Since 777 divided by -111 is a whole number, -111 is a factor of 777

Since 777 divided by -37 is a whole number, -37 is a factor of 777

Since 777 divided by -21 is a whole number, -21 is a factor of 777

Since 777 divided by -7 is a whole number, -7 is a factor of 777

Since 777 divided by -3 is a whole number, -3 is a factor of 777

Since 777 divided by -1 is a whole number, -1 is a factor of 777

Since 777 divided by 1 is a whole number, 1 is a factor of 777

Since 777 divided by 3 is a whole number, 3 is a factor of 777

Since 777 divided by 7 is a whole number, 7 is a factor of 777

Since 777 divided by 21 is a whole number, 21 is a factor of 777

Since 777 divided by 37 is a whole number, 37 is a factor of 777

Since 777 divided by 111 is a whole number, 111 is a factor of 777

Since 777 divided by 259 is a whole number, 259 is a factor of 777

Multiples of 777 are all integers divisible by 777 , i.e. the remainder of the full division by 777 is zero. There are infinite multiples of 777. The smallest multiples of 777 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 777 since 0 × 777 = 0

777 : in fact, 777 is a multiple of itself, since 777 is divisible by 777 (it was 777 / 777 = 1, so the rest of this division is zero)

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 777, the answer is:
**No, 777 is not a prime number**.

To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 777). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 27.875 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.

More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.

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