55066565616 has 20 divisors (see below), whose sum is σ = 142255294632. Its totient is φ = 18355521856.

The previous prime is 55066565599. The next prime is 55066565623. The reversal of 55066565616 is 61656566055.

55066565616 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 3 ways as a sum of consecutive naturals, for example, 573610011 + ... + 573610106.

Almost surely, 2^55066565616 is an apocalyptic number.

It is an amenable number.

55066565616 is an abundant number, since it is smaller than the sum of its proper divisors (87188729016).

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

55066565616 is a wasteful number, since it uses less digits than its factorization.

55066565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147220128 (or 1147220122 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 55066565616 in words is "fifty-five billion, sixty-six million, five hundred sixty-five thousand, six hundred sixteen".