6689108369 has 4 divisors (see below), whose sum is σ = 6764266980. Its totient is φ = 6613949760.

The previous prime is 6689108353. The next prime is 6689108383. The reversal of 6689108369 is 9638019866.

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 3686068369 + 3003040000 = 60713^2 + 54800^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689108369 - 2⁴ = 6689108353 is a prime.

It is a super-2 number, since 2×6689108369² = 89488341544451680322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6689108329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37579172 + ... + 37579349.

It is an arithmetic number, because the mean of its divisors is an integer number (1691066745).

Almost surely, 2^6689108369 is an apocalyptic number.

It is an amenable number.

6689108369 is a deficient number, since it is larger than the sum of its proper divisors (75158611).

6689108369 is an equidigital number, since it uses as much as digits as its factorization.

6689108369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75158610.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 6689108369 is about 81786.9694327892. The cubic root of 6689108369 is about 1884.1815375584.

The spelling of 6689108369 in words is "six billion, six hundred eighty-nine million, one hundred eight thousand, three hundred sixty-nine".