556668686 has 16 divisors (see below), whose sum is σ = 961806336. Its totient is φ = 236693016.

The previous prime is 556668683. The next prime is 556668703. The reversal of 556668686 is 686866655.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556668683) 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, 154766 + ... + 158321.

It is an arithmetic number, because the mean of its divisors is an integer number (60112896).

Almost surely, 2^556668686 is an apocalyptic number.

556668686 is a deficient number, since it is larger than the sum of its proper divisors (405137650).

556668686 is a wasteful number, since it uses less digits than its factorization.

556668686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313223.

The product of its digits is 12441600, while the sum is 56.

The square root of 556668686 is about 23593.8272859661. The cubic root of 556668686 is about 822.6193683056.

The spelling of 556668686 in words is "five hundred fifty-six million, six hundred sixty-eight thousand, six hundred eighty-six".