665554032 has 120 divisors (see below), whose sum is σ = 2188328688. Its totient is φ = 186163200.

The previous prime is 665554027. The next prime is 665554051. The reversal of 665554032 is 230455566.

It is a happy number.

665554032 is a `hidden beast` number, since 66 + 55 + 540 + 3 + 2 = 666.

665554032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×665554032² = 885924339022914048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4432 + ... + 36752.

Almost surely, 2^665554032 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 665554032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094164344).

665554032 is an abundant number, since it is smaller than the sum of its proper divisors (1522774656).

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

665554032 is a wasteful number, since it uses less digits than its factorization.

665554032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32359 (or 32350 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 665554032 is about 25798.3338996920. Note that the first 3 decimals coincide. The cubic root of 665554032 is about 873.0942061672.

The spelling of 665554032 in words is "six hundred sixty-five million, five hundred fifty-four thousand, thirty-two".