78886666668888 has 160 divisors (see below), whose sum is σ = 240964359451200. Its totient is φ = 23965569418752.

The previous prime is 78886666668869. The next prime is 78886666668907. The reversal of 78886666668888 is 88886666668887.

It is an interprime number because it is at equal distance from previous prime (78886666668869) and next prime (78886666668907).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 58603581 + ... + 59934572.

It is an arithmetic number, because the mean of its divisors is an integer number (1506027246570).

Almost surely, 2^{78886666668888} is an apocalyptic number.

78886666668888 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

78886666668888 is an abundant number, since it is smaller than the sum of its proper divisors (162077692782312).

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

78886666668888 is a wasteful number, since it uses less digits than its factorization.

78886666668888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118538263 (or 118538250 counting only the distinct ones).

The product of its digits is 684913065984, while the sum is 99.

Subtracting 78886666668888 from its reverse (88886666668887), we obtain a palindrome (9999999999999).

The spelling of 78886666668888 in words is "seventy-eight trillion, eight hundred eighty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, eight hundred eighty-eight".