66055165660 has 72 divisors (see below), whose sum is σ = 161441879760. Its totient is φ = 22607101440.

The previous prime is 66055165619. The next prime is 66055165669. The reversal of 66055165660 is 6656155066.

It is a self number, because there is not a number n which added to its sum of digits gives 66055165660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66055165669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 761670 + ... + 843949.

It is an arithmetic number, because the mean of its divisors is an integer number (2242248330).

Almost surely, 2^66055165660 is an apocalyptic number.

It is an amenable number.

66055165660 is an abundant number, since it is smaller than the sum of its proper divisors (95386714100).

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

66055165660 is a wasteful number, since it uses less digits than its factorization.

66055165660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605667 (or 1605654 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 66055165660 in words is "sixty-six billion, fifty-five million, one hundred sixty-five thousand, six hundred sixty".