655556722566 has 8 divisors (see below), whose sum is σ = 1311113445144. Its totient is φ = 218518907520.

The previous prime is 655556722547. The next prime is 655556722571. The reversal of 655556722566 is 665227655556.

It is a happy number.

655556722566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

655556722566 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54629726875 + ... + 54629726886.

It is an arithmetic number, because the mean of its divisors is an integer number (163889180643).

Almost surely, 2^655556722566 is an apocalyptic number.

655556722566 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.

655556722566 is a wasteful number, since it uses less digits than its factorization.

655556722566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109259453766.

The product of its digits is 113400000, while the sum is 60.

The spelling of 655556722566 in words is "six hundred fifty-five billion, five hundred fifty-six million, seven hundred twenty-two thousand, five hundred sixty-six".