56755566 has 112 divisors (see below), whose sum is σ = 149837184. Its totient is φ = 15781392.

The previous prime is 56755553. The next prime is 56755579. The reversal of 56755566 is 66555765.

It is an interprime number because it is at equal distance from previous prime (56755553) and next prime (56755579).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 683761 + ... + 683843.

It is an arithmetic number, because the mean of its divisors is an integer number (1337832).

Almost surely, 2^56755566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56755566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74918592).

56755566 is an abundant number, since it is smaller than the sum of its proper divisors (93081618).

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

56755566 is an equidigital number, since it uses as much as digits as its factorization.

56755566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 162 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The square root of 56755566 is about 7533.6290059970. The cubic root of 56755566 is about 384.2992052811.

The spelling of 56755566 in words is "fifty-six million, seven hundred fifty-five thousand, five hundred sixty-six".