866838685 has 8 divisors (see below), whose sum is σ = 1040741856. Its totient is φ = 693114000.

The previous prime is 866838683. The next prime is 866838751. The reversal of 866838685 is 586838668.

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

It is not a de Polignac number, because 866838685 - 2¹ = 866838683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866838683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33691 + ... + 53560.

It is an arithmetic number, because the mean of its divisors is an integer number (130092732).

Almost surely, 2^866838685 is an apocalyptic number.

It is an amenable number.

866838685 is a deficient number, since it is larger than the sum of its proper divisors (173903171).

866838685 is a wasteful number, since it uses less digits than its factorization.

866838685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89243.

The product of its digits is 13271040, while the sum is 58.

The square root of 866838685 is about 29442.1243289271. The cubic root of 866838685 is about 953.4825769114.

The spelling of 866838685 in words is "eight hundred sixty-six million, eight hundred thirty-eight thousand, six hundred eighty-five".