6879779091 has 16 divisors (see below), whose sum is σ = 10195113600. Its totient is φ = 4585237704.

The previous prime is 6879779059. The next prime is 6879779111. The reversal of 6879779091 is 1909779786.

It is not a de Polignac number, because 6879779091 - 2⁵ = 6879779059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6879779891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68320 + ... + 135746.

It is an arithmetic number, because the mean of its divisors is an integer number (637194600).

Almost surely, 2^6879779091 is an apocalyptic number.

6879779091 is a deficient number, since it is larger than the sum of its proper divisors (3315334509).

6879779091 is a wasteful number, since it uses less digits than its factorization.

6879779091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71215 (or 71209 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 63.

The square root of 6879779091 is about 82944.4337553763. The cubic root of 6879779091 is about 1901.9167260459.

The spelling of 6879779091 in words is "six billion, eight hundred seventy-nine million, seven hundred seventy-nine thousand, ninety-one".