6878778786 has 24 divisors (see below), whose sum is σ = 16258932144. Its totient is φ = 2084478360.

The previous prime is 6878778737. The next prime is 6878778793.

6878778786 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17370456 + ... + 17370851.

It is an arithmetic number, because the mean of its divisors is an integer number (677455506).

Almost surely, 2^6878778786 is an apocalyptic number.

6878778786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6878778786 is an abundant number, since it is smaller than the sum of its proper divisors (9380153358).

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

6878778786 is a wasteful number, since it uses less digits than its factorization.

6878778786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34741326 (or 34741323 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The square root of 6878778786 is about 82938.4035655377. The cubic root of 6878778786 is about 1901.8245433853.

The spelling of 6878778786 in words is "six billion, eight hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred eighty-six".