56661072 has 40 divisors (see below), whose sum is σ = 157635744. Its totient is φ = 17433984.

The previous prime is 56661061. The next prime is 56661079. The reversal of 56661072 is 27016665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44778 + ... + 46025.

Almost surely, 2^56661072 is an apocalyptic number.

56661072 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

56661072 is an abundant number, since it is smaller than the sum of its proper divisors (100974672).

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

56661072 is a wasteful number, since it uses less digits than its factorization.

56661072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90827 (or 90821 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 56661072 is about 7527.3549139123. The cubic root of 56661072 is about 384.0858098163.

The spelling of 56661072 in words is "fifty-six million, six hundred sixty-one thousand, seventy-two".