56664679 has 2 divisors, whose sum is σ = 56664680. Its totient is φ = 56664678.

The previous prime is 56664667. The next prime is 56664697. The reversal of 56664679 is 97646665.

Together with next prime (56664697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56664679 - 2¹⁹ = 56140391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56664659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28332339 + 28332340.

It is an arithmetic number, because the mean of its divisors is an integer number (28332340).

Almost surely, 2^56664679 is an apocalyptic number.

56664679 is a deficient number, since it is larger than the sum of its proper divisors (1).

56664679 is an equidigital number, since it uses as much as digits as its factorization.

56664679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 49.

The square root of 56664679 is about 7527.5945028940. The cubic root of 56664679 is about 384.0939598452.

The spelling of 56664679 in words is "fifty-six million, six hundred sixty-four thousand, six hundred seventy-nine".