664105444060 has 48 divisors (see below), whose sum is σ = 1439715594240. Its totient is φ = 257054080320.

The previous prime is 664105444021. The next prime is 664105444061. The reversal of 664105444060 is 60444501466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664105444061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10711831 + ... + 10773649.

It is an arithmetic number, because the mean of its divisors is an integer number (29994074880).

Almost surely, 2^664105444060 is an apocalyptic number.

It is an amenable number.

664105444060 is an abundant number, since it is smaller than the sum of its proper divisors (775610150180).

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

664105444060 is a wasteful number, since it uses less digits than its factorization.

664105444060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79186 (or 79184 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 664105444060 in words is "six hundred sixty-four billion, one hundred five million, four hundred forty-four thousand, sixty".