66055165616 has 40 divisors (see below), whose sum is σ = 146964849600. Its totient is φ = 28444806720.

The previous prime is 66055165607. The next prime is 66055165619. The reversal of 66055165616 is 61656155066.

66055165616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66055165619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9873326 + ... + 9880013.

It is an arithmetic number, because the mean of its divisors is an integer number (3674121240).

Almost surely, 2^66055165616 is an apocalyptic number.

It is an amenable number.

66055165616 is an abundant number, since it is smaller than the sum of its proper divisors (80909683984).

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

66055165616 is a wasteful number, since it uses less digits than its factorization.

66055165616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19753377 (or 19753371 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 66055165616 in words is "sixty-six billion, fifty-five million, one hundred sixty-five thousand, six hundred sixteen".