56666579 has 2 divisors, whose sum is σ = 56666580. Its totient is φ = 56666578.

The previous prime is 56666563. The next prime is 56666653. The reversal of 56666579 is 97566665.

56666579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56666579 - 2⁴ = 56666563 is a prime.

It is a super-2 number, since 2×56666579² = 6422202351126482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56666509) 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 as a sum of consecutive naturals, namely, 28333289 + 28333290.

It is an arithmetic number, because the mean of its divisors is an integer number (28333290).

Almost surely, 2^56666579 is an apocalyptic number.

56666579 is a deficient number, since it is larger than the sum of its proper divisors (1).

56666579 is an equidigital number, since it uses as much as digits as its factorization.

56666579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 50.

The square root of 56666579 is about 7527.7207041707. The cubic root of 56666579 is about 384.0982527626.

The spelling of 56666579 in words is "fifty-six million, six hundred sixty-six thousand, five hundred seventy-nine".