66185454912 has 28 divisors (see below), whose sum is σ = 175115683296. Its totient is φ = 22061818240.

The previous prime is 66185454893. The next prime is 66185454917. The reversal of 66185454912 is 21945458166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66185454917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172357764 + ... + 172358147.

Almost surely, 2^66185454912 is an apocalyptic number.

It is an amenable number.

66185454912 is an abundant number, since it is smaller than the sum of its proper divisors (108930228384).

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

66185454912 is a wasteful number, since it uses less digits than its factorization.

66185454912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344715926 (or 344715916 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The spelling of 66185454912 in words is "sixty-six billion, one hundred eighty-five million, four hundred fifty-four thousand, nine hundred twelve".