66501160165 has 24 divisors (see below), whose sum is σ = 90545140224. Its totient is φ = 46804322400.

The previous prime is 66501160157. The next prime is 66501160211. The reversal of 66501160165 is 56106110566.

It is not a de Polignac number, because 66501160165 - 2³ = 66501160157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1754137 + ... + 1791646.

It is an arithmetic number, because the mean of its divisors is an integer number (3772714176).

Almost surely, 2^66501160165 is an apocalyptic number.

It is an amenable number.

66501160165 is a deficient number, since it is larger than the sum of its proper divisors (24043980059).

66501160165 is a wasteful number, since it uses less digits than its factorization.

66501160165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545841 (or 3545830 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 66501160165 in words is "sixty-six billion, five hundred one million, one hundred sixty thousand, one hundred sixty-five".