655655561566 has 16 divisors (see below), whose sum is σ = 984787650000. Its totient is φ = 327393246528.

The previous prime is 655655561549. The next prime is 655655561573. The reversal of 655655561566 is 665165556556.

It is a happy number.

655655561566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5710561 + ... + 5824243.

It is an arithmetic number, because the mean of its divisors is an integer number (61549228125).

Almost surely, 2^655655561566 is an apocalyptic number.

655655561566 is a deficient number, since it is larger than the sum of its proper divisors (329132088434).

655655561566 is a wasteful number, since it uses less digits than its factorization.

655655561566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117483.

The product of its digits is 121500000, while the sum is 61.

The spelling of 655655561566 in words is "six hundred fifty-five billion, six hundred fifty-five million, five hundred sixty-one thousand, five hundred sixty-six".