8686666868 has 24 divisors (see below), whose sum is σ = 17559146304. Its totient is φ = 3716220800.

The previous prime is 8686666861. The next prime is 8686666889.

8686666868 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×8686666868³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a junction number, because it is equal to n+sod(n) for n = 8686666798 and 8686666807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8686666861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5805848 + ... + 5807343.

It is an arithmetic number, because the mean of its divisors is an integer number (731631096).

Almost surely, 2^8686666868 is an apocalyptic number.

It is an amenable number.

8686666868 is an abundant number, since it is smaller than the sum of its proper divisors (8872479436).

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

8686666868 is a wasteful number, since it uses less digits than its factorization.

8686666868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11613223 (or 11613221 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 68.

The square root of 8686666868 is about 93202.2900362432. The cubic root of 8686666868 is about 2055.6589128314.

The spelling of 8686666868 in words is "eight billion, six hundred eighty-six million, six hundred sixty-six thousand, eight hundred sixty-eight".