56686667 has 4 divisors (see below), whose sum is σ = 56936616. Its totient is φ = 56436720.

The previous prime is 56686657. The next prime is 56686691. The reversal of 56686667 is 76668665.

56686667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56686667 - 2¹⁸ = 56424523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56686657) 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 3 ways as a sum of consecutive naturals, for example, 124634 + ... + 125087.

It is an arithmetic number, because the mean of its divisors is an integer number (14234154).

Almost surely, 2^56686667 is an apocalyptic number.

56686667 is a deficient number, since it is larger than the sum of its proper divisors (249949).

56686667 is a wasteful number, since it uses less digits than its factorization.

56686667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249948.

The product of its digits is 2177280, while the sum is 50.

The square root of 56686667 is about 7529.0548543625. The cubic root of 56686667 is about 384.1436343278.

The spelling of 56686667 in words is "fifty-six million, six hundred eighty-six thousand, six hundred sixty-seven".