66835077673 has 24 divisors (see below), whose sum is σ = 88134184320. Its totient is φ = 50097307680.

The previous prime is 66835077629. The next prime is 66835077709. The reversal of 66835077673 is 37677053866.

It is a happy number.

It is not a de Polignac number, because 66835077673 - 2³³ = 58245143081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66835074673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2748993 + ... + 2773198.

It is an arithmetic number, because the mean of its divisors is an integer number (3672257680).

Almost surely, 2^66835077673 is an apocalyptic number.

It is an amenable number.

66835077673 is a deficient number, since it is larger than the sum of its proper divisors (21299106647).

66835077673 is a wasteful number, since it uses less digits than its factorization.

66835077673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522237 (or 5522230 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 58.

The spelling of 66835077673 in words is "sixty-six billion, eight hundred thirty-five million, seventy-seven thousand, six hundred seventy-three".