47666765691 has 6 divisors (see below), whose sum is σ = 68851994900. Its totient is φ = 31777843788.

The previous prime is 47666765677. The next prime is 47666765701. The reversal of 47666765691 is 19656766674.

It is not a de Polignac number, because 47666765691 - 2⁵ = 47666765659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47666765611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2648153641 + ... + 2648153658.

Almost surely, 2^47666765691 is an apocalyptic number.

47666765691 is a deficient number, since it is larger than the sum of its proper divisors (21185229209).

47666765691 is a wasteful number, since it uses less digits than its factorization.

47666765691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296307305 (or 5296307302 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 47666765691 in words is "forty-seven billion, six hundred sixty-six million, seven hundred sixty-five thousand, six hundred ninety-one".