868666868 has 12 divisors (see below), whose sum is σ = 1522833312. Its totient is φ = 433571640.

The previous prime is 868666849. The next prime is 868666891.

868666868 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 868666868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187880 + ... + 192447.

It is an arithmetic number, because the mean of its divisors is an integer number (126902776).

Almost surely, 2^868666868 is an apocalyptic number.

It is an amenable number.

868666868 is a deficient number, since it is larger than the sum of its proper divisors (654166444).

868666868 is a wasteful number, since it uses less digits than its factorization.

868666868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380902 (or 380900 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 62.

The square root of 868666868 is about 29473.1550397985. The cubic root of 868666868 is about 954.1524118955.

The spelling of 868666868 in words is "eight hundred sixty-eight million, six hundred sixty-six thousand, eight hundred sixty-eight".