664841534084 has 96 divisors (see below), whose sum is σ = 1441264129536. Its totient is φ = 261310095360.

The previous prime is 664841534047. The next prime is 664841534101. The reversal of 664841534084 is 480435148466.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

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, 57671129 + ... + 57682655.

It is an arithmetic number, because the mean of its divisors is an integer number (15013168016).

Almost surely, 2^664841534084 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 664841534084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720632064768).

664841534084 is an abundant number, since it is smaller than the sum of its proper divisors (776422595452).

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

664841534084 is a wasteful number, since it uses less digits than its factorization.

664841534084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12565 (or 12563 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 53.

The spelling of 664841534084 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred thirty-four thousand, eighty-four".