56705766 has 64 divisors (see below), whose sum is σ = 130394880. Its totient is φ = 16295040.

The previous prime is 56705749. The next prime is 56705771. The reversal of 56705766 is 66750765.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122776 + ... + 123236.

It is an arithmetic number, because the mean of its divisors is an integer number (2037420).

Almost surely, 2^56705766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56705766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65197440).

56705766 is an abundant number, since it is smaller than the sum of its proper divisors (73689114).

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

56705766 is a wasteful number, since it uses less digits than its factorization.

56705766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 264600, while the sum is 42.

The square root of 56705766 is about 7530.3231006378. The cubic root of 56705766 is about 384.1867716641.

The spelling of 56705766 in words is "fifty-six million, seven hundred five thousand, seven hundred sixty-six".