66659137912 has 16 divisors (see below), whose sum is σ = 128034320400. Its totient is φ = 32516652480.

The previous prime is 66659137889. The next prime is 66659137999. The reversal of 66659137912 is 21973195666.

It is a congruent number.

It is an unprimeable number.

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, 101614212 + ... + 101614867.

It is an arithmetic number, because the mean of its divisors is an integer number (8002145025).

Almost surely, 2^66659137912 is an apocalyptic number.

It is an amenable number.

66659137912 is a deficient number, since it is larger than the sum of its proper divisors (61375182488).

66659137912 is a wasteful number, since it uses less digits than its factorization.

66659137912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203229126 (or 203229122 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 55.

The spelling of 66659137912 in words is "sixty-six billion, six hundred fifty-nine million, one hundred thirty-seven thousand, nine hundred twelve".