66256432 has 40 divisors (see below), whose sum is σ = 141522192. Its totient is φ = 29798400.

The previous prime is 66256427. The next prime is 66256447. The reversal of 66256432 is 23465266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15132 + ... + 19012.

Almost surely, 2^66256432 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 66256432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70761096).

66256432 is an abundant number, since it is smaller than the sum of its proper divisors (75265760).

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

66256432 is a wasteful number, since it uses less digits than its factorization.

66256432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 3991 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 66256432 is about 8139.8054030794. The cubic root of 66256432 is about 404.6467111646.

It can be divided in two parts, 662564 and 32, that added together give a square (662596 = 814²).

The spelling of 66256432 in words is "sixty-six million, two hundred fifty-six thousand, four hundred thirty-two".