664536635466 has 64 divisors (see below), whose sum is σ = 1456859174400. Its totient is φ = 200410165440.

The previous prime is 664536635387. The next prime is 664536635473.

664536635466 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12019201 + ... + 12074363.

It is an arithmetic number, because the mean of its divisors is an integer number (22763424600).

Almost surely, 2^664536635466 is an apocalyptic number.

664536635466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

664536635466 is an abundant number, since it is smaller than the sum of its proper divisors (792322538934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664536635466 is a wasteful number, since it uses less digits than its factorization.

664536635466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56051.

The product of its digits is 167961600, while the sum is 60.

The spelling of 664536635466 in words is "six hundred sixty-four billion, five hundred thirty-six million, six hundred thirty-five thousand, four hundred sixty-six".