664775612464526 has 8 divisors (see below), whose sum is σ = 997360837721784. Its totient is φ = 332321999890600.

The previous prime is 664775612464423. The next prime is 664775612464529. The reversal of 664775612464526 is 625464216577466.

664775612464526 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664775612464526² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664775612464526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664775612464529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32903158205 + ... + 32903178408.

It is an arithmetic number, because the mean of its divisors is an integer number (124670104715223).

Almost surely, 2^{664775612464526} is an apocalyptic number.

664775612464526 is a deficient number, since it is larger than the sum of its proper divisors (332585225257258).

664775612464526 is a wasteful number, since it uses less digits than its factorization.

664775612464526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65806341666.

The product of its digits is 2438553600, while the sum is 71.

The spelling of 664775612464526 in words is "six hundred sixty-four trillion, seven hundred seventy-five billion, six hundred twelve million, four hundred sixty-four thousand, five hundred twenty-six".