66784504711672 has 16 divisors (see below), whose sum is σ = 136604668728600. Its totient is φ = 30356593050720.

The previous prime is 66784504711583. The next prime is 66784504711681. The reversal of 66784504711672 is 27611740548766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379457413047 + ... + 379457413222.

Almost surely, 2^{66784504711672} is an apocalyptic number.

It is an amenable number.

66784504711672 is an abundant number, since it is smaller than the sum of its proper divisors (69820164016928).

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

66784504711672 is a wasteful number, since it uses less digits than its factorization.

66784504711672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758914826286 (or 758914826282 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 64.

The spelling of 66784504711672 in words is "sixty-six trillion, seven hundred eighty-four billion, five hundred four million, seven hundred eleven thousand, six hundred seventy-two".