665611565130 has 80 divisors (see below), whose sum is σ = 1789889983200. Its totient is φ = 177483084768.

The previous prime is 665611565119. The next prime is 665611565161. The reversal of 665611565130 is 31565116566.

665611565130 is a `hidden beast` number, since 6 + 6 + 56 + 1 + 1 + 565 + 1 + 30 = 666.

665611565130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15714721 + ... + 15757019.

It is an arithmetic number, because the mean of its divisors is an integer number (22373624790).

Almost surely, 2^665611565130 is an apocalyptic number.

665611565130 is an abundant number, since it is smaller than the sum of its proper divisors (1124278418070).

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

665611565130 is a wasteful number, since it uses less digits than its factorization.

665611565130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61745 (or 61736 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 665611565130 in words is "six hundred sixty-five billion, six hundred eleven million, five hundred sixty-five thousand, one hundred thirty".