56166786 has 48 divisors (see below), whose sum is σ = 133870464. Its totient is φ = 16911072.

The previous prime is 56166749. The next prime is 56166791. The reversal of 56166786 is 68766165.

56166786 is a `hidden beast` number, since 561 + 6 + 6 + 7 + 86 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8445 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (2788968).

Almost surely, 2^56166786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56166786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66935232).

56166786 is an abundant number, since it is smaller than the sum of its proper divisors (77703678).

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

56166786 is a wasteful number, since it uses less digits than its factorization.

56166786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175 (or 5172 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 56166786 is about 7494.4503467566. The cubic root of 56166786 is about 382.9656816958.

The spelling of 56166786 in words is "fifty-six million, one hundred sixty-six thousand, seven hundred eighty-six".