6869779686 has 96 divisors (see below), whose sum is σ = 18601809408. Its totient is φ = 1780081920.

The previous prime is 6869779667. The next prime is 6869779691.

6869779686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 594415 + ... + 605861.

It is an arithmetic number, because the mean of its divisors is an integer number (193768848).

Almost surely, 2^6869779686 is an apocalyptic number.

6869779686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6869779686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9300904704).

6869779686 is an abundant number, since it is smaller than the sum of its proper divisors (11732029722).

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

6869779686 is a wasteful number, since it uses less digits than its factorization.

6869779686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11906 (or 11903 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The square root of 6869779686 is about 82884.1341029753. The cubic root of 6869779686 is about 1900.9948332193.

The spelling of 6869779686 in words is "six billion, eight hundred sixty-nine million, seven hundred seventy-nine thousand, six hundred eighty-six".