65165217765 has 16 divisors (see below), whose sum is σ = 106482739968. Its totient is φ = 34015318976.

The previous prime is 65165217763. The next prime is 65165217773. The reversal of 65165217765 is 56771256156.

It is a cyclic number.

It is not a de Polignac number, because 65165217765 - 2¹ = 65165217763 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65165217763) 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, 46215762 + ... + 46217171.

It is an arithmetic number, because the mean of its divisors is an integer number (6655171248).

Almost surely, 2^65165217765 is an apocalyptic number.

It is an amenable number.

65165217765 is a deficient number, since it is larger than the sum of its proper divisors (41317522203).

65165217765 is a wasteful number, since it uses less digits than its factorization.

65165217765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92432988.

The product of its digits is 2646000, while the sum is 51.

The spelling of 65165217765 in words is "sixty-five billion, one hundred sixty-five million, two hundred seventeen thousand, seven hundred sixty-five".