85566666558 has 8 divisors (see below), whose sum is σ = 171133333128. Its totient is φ = 28522222184.

The previous prime is 85566666529. The next prime is 85566666589.

85566666558 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

85566666558 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7130555541 + ... + 7130555552.

It is an arithmetic number, because the mean of its divisors is an integer number (21391666641).

Almost surely, 2^85566666558 is an apocalyptic number.

85566666558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85566666558 is a wasteful number, since it uses less digits than its factorization.

85566666558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14261111098.

The product of its digits is 311040000, while the sum is 66.

The spelling of 85566666558 in words is "eighty-five billion, five hundred sixty-six million, six hundred sixty-six thousand, five hundred fifty-eight".