56667790 has 16 divisors (see below), whose sum is σ = 102539520. Its totient is φ = 22547680.

The previous prime is 56667773. The next prime is 56667797. The reversal of 56667790 is 9776665.

56667790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×56667790² = 6422476846968200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56667790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56667797) 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, 12925 + ... + 16744.

It is an arithmetic number, because the mean of its divisors is an integer number (6408720).

Almost surely, 2^56667790 is an apocalyptic number.

56667790 is a deficient number, since it is larger than the sum of its proper divisors (45871730).

56667790 is a wasteful number, since it uses less digits than its factorization.

56667790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29867.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 56667790 is about 7527.8011397751. The cubic root of 56667790 is about 384.1009888826.

It can be divided in two parts, 5666 and 7790, that added together give a square (13456 = 116²).

The spelling of 56667790 in words is "fifty-six million, six hundred sixty-seven thousand, seven hundred ninety".