868686181 has 8 divisors (see below), whose sum is σ = 953695584. Its totient is φ = 784683120.

The previous prime is 868686167. The next prime is 868686193. The reversal of 868686181 is 181686868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 868686181 - 2⁷ = 868686053 is a prime.

It is a super-2 number, since 2×868686181² = 1509231362120729522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868686121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249775 + ... + 253228.

It is an arithmetic number, because the mean of its divisors is an integer number (119211948).

Almost surely, 2^868686181 is an apocalyptic number.

It is an amenable number.

868686181 is a deficient number, since it is larger than the sum of its proper divisors (85009403).

868686181 is a wasteful number, since it uses less digits than its factorization.

868686181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503171.

The product of its digits is 884736, while the sum is 52.

The square root of 868686181 is about 29473.4826751098. The cubic root of 868686181 is about 954.1594830408.

The spelling of 868686181 in words is "eight hundred sixty-eight million, six hundred eighty-six thousand, one hundred eighty-one".