In addition we can say of the number 70 that it is even
70 is an even number, as it is divisible by 2 : 70/2 = 35
The factors for 70 are all the numbers between -70 and 70 , which divide 70 without leaving any remainder. Since 70 divided by -70 is an integer, -70 is a factor of 70 .
Since 70 divided by -70 is a whole number, -70 is a factor of 70
Since 70 divided by -35 is a whole number, -35 is a factor of 70
Since 70 divided by -14 is a whole number, -14 is a factor of 70
Since 70 divided by -10 is a whole number, -10 is a factor of 70
Since 70 divided by -7 is a whole number, -7 is a factor of 70
Since 70 divided by -5 is a whole number, -5 is a factor of 70
Since 70 divided by -2 is a whole number, -2 is a factor of 70
Since 70 divided by -1 is a whole number, -1 is a factor of 70
Multiples of 70 are all integers divisible by 70 , i.e. the remainder of the full division by 70 is zero. There are infinite multiples of 70. The smallest multiples of 70 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 70, the answer is: No, 70 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 70). 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 8.367 ). 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.
Previous prime number: 67
Next prime number: 71