664205610713 has 4 divisors (see below), whose sum is σ = 664224964068. Its totient is φ = 664186257360.

The previous prime is 664205610707. The next prime is 664205610821. The reversal of 664205610713 is 317016502466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63560460544 + 600645150169 = 252112^2 + 775013^2 .

It is a cyclic number.

It is not a de Polignac number, because 664205610713 - 2⁴ = 664205610697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664205610413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9625106 + ... + 9693867.

It is an arithmetic number, because the mean of its divisors is an integer number (166056241017).

Almost surely, 2^664205610713 is an apocalyptic number.

It is an amenable number.

664205610713 is a deficient number, since it is larger than the sum of its proper divisors (19353355).

664205610713 is a wasteful number, since it uses less digits than its factorization.

664205610713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19353354.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 664205610713 in words is "six hundred sixty-four billion, two hundred five million, six hundred ten thousand, seven hundred thirteen".