6689865129 has 8 divisors (see below), whose sum is σ = 8921248320. Its totient is φ = 4459196016.

The previous prime is 6689865113. The next prime is 6689865139. The reversal of 6689865129 is 9215689866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6689865129 - 2⁴ = 6689865113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6689865139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156262 + ... + 194415.

It is an arithmetic number, because the mean of its divisors is an integer number (1115156040).

Almost surely, 2^6689865129 is an apocalyptic number.

It is an amenable number.

6689865129 is a deficient number, since it is larger than the sum of its proper divisors (2231383191).

6689865129 is a wasteful number, since it uses less digits than its factorization.

6689865129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357039.

The product of its digits is 11197440, while the sum is 60.

The square root of 6689865129 is about 81791.5957112954. The cubic root of 6689865129 is about 1884.2525893525.

The spelling of 6689865129 in words is "six billion, six hundred eighty-nine million, eight hundred sixty-five thousand, one hundred twenty-nine".