66165047212 has 18 divisors (see below), whose sum is σ = 127272023564. Its totient is φ = 30075021240.

The previous prime is 66165047171. The next prime is 66165047231. The reversal of 66165047212 is 21274056166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68351838 + ... + 68352805.

Almost surely, 2^66165047212 is an apocalyptic number.

It is an amenable number.

66165047212 is a deficient number, since it is larger than the sum of its proper divisors (61106976352).

66165047212 is a wasteful number, since it uses less digits than its factorization.

66165047212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136704669 (or 136704656 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 66165047212 in words is "sixty-six billion, one hundred sixty-five million, forty-seven thousand, two hundred twelve".