6689838816 has 96 divisors (see below), whose sum is σ = 19759219200. Its totient is φ = 2201696640.

The previous prime is 6689838797. The next prime is 6689838823. The reversal of 6689838816 is 6188389866.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19251 + ... + 117261.

It is an arithmetic number, because the mean of its divisors is an integer number (205825200).

Almost surely, 2^6689838816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6689838816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9879609600).

6689838816 is an abundant number, since it is smaller than the sum of its proper divisors (13069380384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6689838816 is a wasteful number, since it uses less digits than its factorization.

6689838816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98109 (or 98095 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The square root of 6689838816 is about 81791.4348572025. The cubic root of 6689838816 is about 1884.2501189289.

The spelling of 6689838816 in words is "six billion, six hundred eighty-nine million, eight hundred thirty-eight thousand, eight hundred sixteen".