66505170116 has 48 divisors (see below), whose sum is σ = 145197265920. Its totient is φ = 25894127520.

The previous prime is 66505170103. The next prime is 66505170119. The reversal of 66505170116 is 61107150566.

It is a self number, because there is not a number n which added to its sum of digits gives 66505170116.

It is not an unprimeable number, because it can be changed into a prime (66505170119) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 405275 + ... + 545213.

It is an arithmetic number, because the mean of its divisors is an integer number (3024943040).

Almost surely, 2^66505170116 is an apocalyptic number.

It is an amenable number.

66505170116 is an abundant number, since it is smaller than the sum of its proper divisors (78692095804).

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

66505170116 is a wasteful number, since it uses less digits than its factorization.

66505170116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141504 (or 141502 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 66505170116 in words is "sixty-six billion, five hundred five million, one hundred seventy thousand, one hundred sixteen".