7878668788 has 12 divisors (see below), whose sum is σ = 13788618592. Its totient is φ = 3939063480.

The previous prime is 7878668783. The next prime is 7878668789. The reversal of 7878668788 is 8878668787.

It is a self number, because there is not a number n which added to its sum of digits gives 7878668788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878668783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6823 + ... + 125713.

Almost surely, 2^7878668788 is an apocalyptic number.

It is an amenable number.

7878668788 is a deficient number, since it is larger than the sum of its proper divisors (5909949804).

7878668788 is a wasteful number, since it uses less digits than its factorization.

7878668788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135462 (or 135460 counting only the distinct ones).

The product of its digits is 404619264, while the sum is 73.

The square root of 7878668788 is about 88761.8656180682. The cubic root of 7878668788 is about 1989.8375150786.

Subtracting 7878668788 from its reverse (8878668787), we obtain a palindrome (999999999).

The spelling of 7878668788 in words is "seven billion, eight hundred seventy-eight million, six hundred sixty-eight thousand, seven hundred eighty-eight".