56666779 has 16 divisors (see below), whose sum is σ = 64512000. Its totient is φ = 49379616.

The previous prime is 56666773. The next prime is 56666803. The reversal of 56666779 is 97766665.

56666779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56666779 - 2¹³ = 56658587 is a prime.

It is a super-2 number, since 2×56666779² = 6422247684469682, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (56666773) 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 15 ways as a sum of consecutive naturals, for example, 22422 + ... + 24820.

It is an arithmetic number, because the mean of its divisors is an integer number (4032000).

Almost surely, 2^56666779 is an apocalyptic number.

56666779 is a deficient number, since it is larger than the sum of its proper divisors (7845221).

56666779 is a wasteful number, since it uses less digits than its factorization.

56666779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514.

The product of its digits is 2857680, while the sum is 52.

The square root of 56666779 is about 7527.7339883925. The cubic root of 56666779 is about 384.0987046431.

The spelling of 56666779 in words is "fifty-six million, six hundred sixty-six thousand, seven hundred seventy-nine".