866845807 has 8 divisors (see below), whose sum is σ = 881541792. Its totient is φ = 852165600.

The previous prime is 866845801. The next prime is 866845843. The reversal of 866845807 is 708548668.

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 866845807 - 2²⁷ = 732628079 is a prime.

It is a super-2 number, since 2×866845807² = 1502843306226962498, 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 (866845801) 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, 172038 + ... + 177004.

It is an arithmetic number, because the mean of its divisors is an integer number (110192724).

Almost surely, 2^866845807 is an apocalyptic number.

866845807 is a deficient number, since it is larger than the sum of its proper divisors (14695985).

866845807 is a wasteful number, since it uses less digits than its factorization.

866845807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The square root of 866845807 is about 29442.2452778316. The cubic root of 866845807 is about 953.4851881948.

The spelling of 866845807 in words is "eight hundred sixty-six million, eight hundred forty-five thousand, eight hundred seven".