664412627546565 has 32 divisors (see below), whose sum is σ = 1064302357762560. Its totient is φ = 353939474617344.

The previous prime is 664412627546533. The next prime is 664412627546579. The reversal of 664412627546565 is 565645726214466.

664412627546565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664412627546565 - 2⁵ = 664412627546533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664412627546565.

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, 81580407 + ... + 89354283.

It is an arithmetic number, because the mean of its divisors is an integer number (33259448680080).

Almost surely, 2^{664412627546565} is an apocalyptic number.

It is an amenable number.

664412627546565 is a deficient number, since it is larger than the sum of its proper divisors (399889730215995).

664412627546565 is a wasteful number, since it uses less digits than its factorization.

664412627546565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780541.

The product of its digits is 1741824000, while the sum is 69.

The spelling of 664412627546565 in words is "six hundred sixty-four trillion, four hundred twelve billion, six hundred twenty-seven million, five hundred forty-six thousand, five hundred sixty-five".