6688860689 has 12 divisors (see below), whose sum is σ = 7874670384. Its totient is φ = 5664229704.

The previous prime is 6688860679. The next prime is 6688860697. The reversal of 6688860689 is 9860688866.

It is not a de Polignac number, because 6688860689 - 2²⁰ = 6687812113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6688860649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 818267 + ... + 826400.

It is an arithmetic number, because the mean of its divisors is an integer number (656222532).

Almost surely, 2^6688860689 is an apocalyptic number.

It is an amenable number.

6688860689 is a deficient number, since it is larger than the sum of its proper divisors (1185809695).

6688860689 is a wasteful number, since it uses less digits than its factorization.

6688860689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644764 (or 1644757 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 65.

The square root of 6688860689 is about 81785.4552411369. The cubic root of 6688860689 is about 1884.1582818509.

The spelling of 6688860689 in words is "six billion, six hundred eighty-eight million, eight hundred sixty thousand, six hundred eighty-nine".