90566664612 has 12 divisors (see below), whose sum is σ = 211322217456. Its totient is φ = 30188888200.

The previous prime is 90566664607. The next prime is 90566664647. The reversal of 90566664612 is 21646666509.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×90566664612² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3773611014 + ... + 3773611037.

It is an arithmetic number, because the mean of its divisors is an integer number (17610184788).

Almost surely, 2^90566664612 is an apocalyptic number.

It is an amenable number.

90566664612 is an abundant number, since it is smaller than the sum of its proper divisors (120755552844).

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

90566664612 is a wasteful number, since it uses less digits than its factorization.

90566664612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547222058 (or 7547222056 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 90566664612 in words is "ninety billion, five hundred sixty-six million, six hundred sixty-four thousand, six hundred twelve".