664524436264 has 96 divisors (see below), whose sum is σ = 1364380070400. Its totient is φ = 303261254400.

The previous prime is 664524436259. The next prime is 664524436267. The reversal of 664524436264 is 462634425466.

664524436264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (664524436267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117841557 + ... + 117847195.

It is an arithmetic number, because the mean of its divisors is an integer number (14212292400).

Almost surely, 2^664524436264 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 664524436264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682190035200).

664524436264 is an abundant number, since it is smaller than the sum of its proper divisors (699855634136).

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

664524436264 is a wasteful number, since it uses less digits than its factorization.

664524436264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635 (or 6618 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 52.

The spelling of 664524436264 in words is "six hundred sixty-four billion, five hundred twenty-four million, four hundred thirty-six thousand, two hundred sixty-four".