86687878668 has 48 divisors (see below), whose sum is σ = 203118300000. Its totient is φ = 28775121408.

The previous prime is 86687878637. The next prime is 86687878679.

86687878668 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86687878593 and 86687878602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8868888 + ... + 8878656.

It is an arithmetic number, because the mean of its divisors is an integer number (4231631250).

Almost surely, 2^86687878668 is an apocalyptic number.

It is an amenable number.

86687878668 is an abundant number, since it is smaller than the sum of its proper divisors (116430421332).

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

86687878668 is a wasteful number, since it uses less digits than its factorization.

86687878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794 (or 12792 counting only the distinct ones).

The product of its digits is 2080899072, while the sum is 78.

It can be divided in two parts, 86687 and 878668, that added together give a triangular number (965355 = T₁₃₈₉).

The spelling of 86687878668 in words is "eighty-six billion, six hundred eighty-seven million, eight hundred seventy-eight thousand, six hundred sixty-eight".