56778766 has 36 divisors (see below), whose sum is σ = 98661528. Its totient is φ = 24442000.

The previous prime is 56778737. The next prime is 56778797. The reversal of 56778766 is 66787765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 562116 + ... + 562216.

It is an arithmetic number, because the mean of its divisors is an integer number (2740598).

Almost surely, 2^56778766 is an apocalyptic number.

56778766 is a deficient number, since it is larger than the sum of its proper divisors (41882762).

56778766 is a wasteful number, since it uses less digits than its factorization.

56778766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 137 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 52.

The square root of 56778766 is about 7535.1686112522. The cubic root of 56778766 is about 384.3515615382.

The spelling of 56778766 in words is "fifty-six million, seven hundred seventy-eight thousand, seven hundred sixty-six".