664376133432 has 128 divisors (see below), whose sum is σ = 1847393775360. Its totient is φ = 197391467520.

The previous prime is 664376133401. The next prime is 664376133451. The reversal of 664376133432 is 234331673466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21294228 + ... + 21325404.

It is an arithmetic number, because the mean of its divisors is an integer number (14432763870).

Almost surely, 2^664376133432 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 664376133432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923696887680).

664376133432 is an abundant number, since it is smaller than the sum of its proper divisors (1183017641928).

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

664376133432 is a wasteful number, since it uses less digits than its factorization.

664376133432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32773 (or 32769 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 48.

The spelling of 664376133432 in words is "six hundred sixty-four billion, three hundred seventy-six million, one hundred thirty-three thousand, four hundred thirty-two".