56181660 has 24 divisors (see below), whose sum is σ = 157308816. Its totient is φ = 14981760.

The previous prime is 56181649. The next prime is 56181667. The reversal of 56181660 is 6618165.

56181660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56181667) by changing a digit.

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, 468121 + ... + 468240.

It is an arithmetic number, because the mean of its divisors is an integer number (6554534).

Almost surely, 2^56181660 is an apocalyptic number.

It is an amenable number.

56181660 is an abundant number, since it is smaller than the sum of its proper divisors (101127156).

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

56181660 is a wasteful number, since it uses less digits than its factorization.

56181660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936373 (or 936371 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56181660 is about 7495.4426153497. The cubic root of 56181660 is about 382.9994841688. Note that the first 3 decimals are identical.

The spelling of 56181660 in words is "fifty-six million, one hundred eighty-one thousand, six hundred sixty".