56666610 has 384 divisors, whose sum is σ = 215115264. Its totient is φ = 9953280.

The previous prime is 56666579. The next prime is 56666653. The reversal of 56666610 is 1666665.

56666610 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-2 number, since 2×56666610² = 6422209377784200, which contains 22 as substring.

It is a Curzon number.

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 191 ways as a sum of consecutive naturals, for example, 1531512 + ... + 1531548.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^56666610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56666610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107557632).

56666610 is an abundant number, since it is smaller than the sum of its proper divisors (158448654).

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

56666610 is a wasteful number, since it uses less digits than its factorization.

56666610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 56666610 is about 7527.7227632266. The cubic root of 56666610 is about 384.0983228042.

Subtracting from 56666610 its reverse (1666665), we obtain a palindrome (54999945).

It can be divided in two parts, 566 and 66610, that added together give a palindrome (67176).

The spelling of 56666610 in words is "fifty-six million, six hundred sixty-six thousand, six hundred ten".