7688778867 has 72 divisors (see below), whose sum is σ = 14017016832. Its totient is φ = 3975380640.

The previous prime is 7688778863. The next prime is 7688778869.

7688778867 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7688778867 - 2² = 7688778863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7688778795 and 7688778804.

It is not an unprimeable number, because it can be changed into a prime (7688778863) 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 71 ways as a sum of consecutive naturals, for example, 1697668 + ... + 1702190.

Almost surely, 2^7688778867 is an apocalyptic number.

7688778867 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7688778867 is a deficient number, since it is larger than the sum of its proper divisors (6328237965).

7688778867 is a wasteful number, since it uses less digits than its factorization.

7688778867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4767 counting only the distinct ones).

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

The square root of 7688778867 is about 87685.6822234964. The cubic root of 7688778867 is about 1973.7211283387.

The spelling of 7688778867 in words is "seven billion, six hundred eighty-eight million, seven hundred seventy-eight thousand, eight hundred sixty-seven".