661086832 has 60 divisors (see below), whose sum is σ = 1510516416. Its totient is φ = 279417600.

The previous prime is 661086823. The next prime is 661086851. The reversal of 661086832 is 238680166.

661086832 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-3 number, since 3×661086832³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51457 + ... + 63007.

Almost surely, 2^661086832 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 661086832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755258208).

661086832 is an abundant number, since it is smaller than the sum of its proper divisors (849429584).

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

661086832 is a wasteful number, since it uses less digits than its factorization.

661086832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11646 (or 11633 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 661086832 is about 25711.6088955942. The cubic root of 661086832 is about 871.1364160261.

The spelling of 661086832 in words is "six hundred sixty-one million, eighty-six thousand, eight hundred thirty-two".