65686432 has 48 divisors (see below), whose sum is σ = 149022720. Its totient is φ = 27917568.

The previous prime is 65686417. The next prime is 65686441. The reversal of 65686432 is 23468656.

It is a happy number.

65686432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27294 + ... + 29602.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^65686432 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 65686432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74511360).

65686432 is an abundant number, since it is smaller than the sum of its proper divisors (83336288).

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

65686432 is a wasteful number, since it uses less digits than its factorization.

65686432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453 (or 2445 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 65686432 is about 8104.7166514321. The cubic root of 65686432 is about 403.4829840292.

The spelling of 65686432 in words is "sixty-five million, six hundred eighty-six thousand, four hundred thirty-two".