664875579788 has 48 divisors (see below), whose sum is σ = 1373770911744. Its totient is φ = 275528934720.

The previous prime is 664875579787. The next prime is 664875579803. The reversal of 664875579788 is 887975578466.

664875579788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (664875579787) 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, 748406 + ... + 1374722.

It is an arithmetic number, because the mean of its divisors is an integer number (28620227328).

Almost surely, 2^664875579788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664875579788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686885455872).

664875579788 is an abundant number, since it is smaller than the sum of its proper divisors (708895331956).

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

664875579788 is a wasteful number, since it uses less digits than its factorization.

664875579788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627582 (or 627580 counting only the distinct ones).

The product of its digits is 5689958400, while the sum is 80.

The spelling of 664875579788 in words is "six hundred sixty-four billion, eight hundred seventy-five million, five hundred seventy-nine thousand, seven hundred eighty-eight".