6687195879 has 64 divisors (see below), whose sum is σ = 11170632704. Its totient is φ = 3464487936.

The previous prime is 6687195857. The next prime is 6687195883. The reversal of 6687195879 is 9785917866.

It is not a de Polignac number, because 6687195879 - 2⁷ = 6687195751 is a prime.

It is a super-2 number, since 2×6687195879² = 89437177448229165282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687195379) 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 63 ways as a sum of consecutive naturals, for example, 6117657 + ... + 6118749.

It is an arithmetic number, because the mean of its divisors is an integer number (174541136).

Almost surely, 2^6687195879 is an apocalyptic number.

6687195879 is a deficient number, since it is larger than the sum of its proper divisors (4483436825).

6687195879 is a wasteful number, since it uses less digits than its factorization.

6687195879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its digits is 45722880, while the sum is 66.

The square root of 6687195879 is about 81775.2766977893. The cubic root of 6687195879 is about 1884.0019510012.

It can be divided in two parts, 6687 and 195879, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 6687195879 in words is "six billion, six hundred eighty-seven million, one hundred ninety-five thousand, eight hundred seventy-nine".