665133855232 has 160 divisors (see below), whose sum is σ = 1754362177920. Its totient is φ = 243899105280.

The previous prime is 665133855179. The next prime is 665133855301. The reversal of 665133855232 is 232558331566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173994 + ... + 1166422.

It is an arithmetic number, because the mean of its divisors is an integer number (10964763612).

Almost surely, 2^665133855232 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 665133855232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877181088960).

665133855232 is an abundant number, since it is smaller than the sum of its proper divisors (1089228322688).

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

665133855232 is a wasteful number, since it uses less digits than its factorization.

665133855232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992482 (or 992466 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 49.

The spelling of 665133855232 in words is "six hundred sixty-five billion, one hundred thirty-three million, eight hundred fifty-five thousand, two hundred thirty-two".