56783666 has 16 divisors (see below), whose sum is σ = 89849760. Its totient is φ = 26840160.

The previous prime is 56783663. The next prime is 56783669. The reversal of 56783666 is 66638765.

It is a happy number.

56783666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56783663) and next prime (56783669).

It is a self number, because there is not a number n which added to its sum of digits gives 56783666.

It is not an unprimeable number, because it can be changed into a prime (56783663) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20390 + ... + 23006.

It is an arithmetic number, because the mean of its divisors is an integer number (5615610).

Almost surely, 2^56783666 is an apocalyptic number.

56783666 is a deficient number, since it is larger than the sum of its proper divisors (33066094).

56783666 is a wasteful number, since it uses less digits than its factorization.

56783666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209.

The product of its digits is 1088640, while the sum is 47.

The square root of 56783666 is about 7535.4937462651. The cubic root of 56783666 is about 384.3626177164.

The spelling of 56783666 in words is "fifty-six million, seven hundred eighty-three thousand, six hundred sixty-six".