7664718317 has 2 divisors, whose sum is σ = 7664718318. Its totient is φ = 7664718316.

The previous prime is 7664718301. The next prime is 7664718319. The reversal of 7664718317 is 7138174667.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7223130121 + 441588196 = 84989^2 + 21014^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664718317 - 2⁴ = 7664718301 is a prime.

Together with 7664718319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7664718319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832359158 + 3832359159.

It is an arithmetic number, because the mean of its divisors is an integer number (3832359159).

Almost surely, 2^7664718317 is an apocalyptic number.

It is an amenable number.

7664718317 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664718317 is an equidigital number, since it uses as much as digits as its factorization.

7664718317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 50.

The square root of 7664718317 is about 87548.3770095140. The cubic root of 7664718317 is about 1971.6601839109.

The spelling of 7664718317 in words is "seven billion, six hundred sixty-four million, seven hundred eighteen thousand, three hundred seventeen".