665101565065 has 16 divisors (see below), whose sum is σ = 912439382400. Its totient is φ = 455919598080.

The previous prime is 665101565053. The next prime is 665101565069. The reversal of 665101565065 is 560565101566.

665101565065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665101565065 - 2¹¹ = 665101563017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665101565069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3018015 + ... + 3230884.

It is an arithmetic number, because the mean of its divisors is an integer number (57027461400).

Almost surely, 2^665101565065 is an apocalyptic number.

It is an amenable number.

665101565065 is a deficient number, since it is larger than the sum of its proper divisors (247337817335).

665101565065 is a wasteful number, since it uses less digits than its factorization.

665101565065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6251952.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 665101565065 in words is "six hundred sixty-five billion, one hundred one million, five hundred sixty-five thousand, sixty-five".