65516616165 has 128 divisors (see below), whose sum is σ = 141584486400. Its totient is φ = 25132273920.

The previous prime is 65516616103. The next prime is 65516616199. The reversal of 65516616165 is 56161661556.

It is not a de Polignac number, because 65516616165 - 2²³ = 65508227557 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2524626 + ... + 2550444.

It is an arithmetic number, because the mean of its divisors is an integer number (1106128800).

Almost surely, 2^65516616165 is an apocalyptic number.

65516616165 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65516616165 is an abundant number, since it is smaller than the sum of its proper divisors (76067870235).

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

65516616165 is a wasteful number, since it uses less digits than its factorization.

65516616165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25884 (or 25858 counting only the distinct ones).

The product of its digits is 972000, while the sum is 48.

The spelling of 65516616165 in words is "sixty-five billion, five hundred sixteen million, six hundred sixteen thousand, one hundred sixty-five".