8666529673 has 4 divisors (see below), whose sum is σ = 8669630980. Its totient is φ = 8663428368.

The previous prime is 8666529659. The next prime is 8666529701. The reversal of 8666529673 is 3769256668.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6841274944 + 1825254729 = 82712^2 + 42723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8666529673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8666529623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1546458 + ... + 1552051.

It is an arithmetic number, because the mean of its divisors is an integer number (2167407745).

Almost surely, 2^8666529673 is an apocalyptic number.

It is an amenable number.

8666529673 is a deficient number, since it is larger than the sum of its proper divisors (3101307).

8666529673 is a wasteful number, since it uses less digits than its factorization.

8666529673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101306.

The product of its digits is 19595520, while the sum is 58.

The square root of 8666529673 is about 93094.1978482010. The cubic root of 8666529673 is about 2054.0692262712.

The spelling of 8666529673 in words is "eight billion, six hundred sixty-six million, five hundred twenty-nine thousand, six hundred seventy-three".