664523130765 has 32 divisors (see below), whose sum is σ = 1161151600896. Its totient is φ = 322542097920.

The previous prime is 664523130757. The next prime is 664523130773. The reversal of 664523130765 is 567031325466.

664523130765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664523130757) and next prime (664523130773).

It is not a de Polignac number, because 664523130765 - 2³ = 664523130757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23984824 + ... + 24012513.

It is an arithmetic number, because the mean of its divisors is an integer number (36285987528).

Almost surely, 2^664523130765 is an apocalyptic number.

664523130765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664523130765 is a deficient number, since it is larger than the sum of its proper divisors (496628470131).

664523130765 is a wasteful number, since it uses less digits than its factorization.

664523130765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47997429.

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 664523130765 in words is "six hundred sixty-four billion, five hundred twenty-three million, one hundred thirty thousand, seven hundred sixty-five".