866180 has 48 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 283008.

The previous prime is 866161. The next prime is 866183. The reversal of 866180 is 81668.

866180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866180.

It is not an unprimeable number, because it can be changed into a prime (866183) by changing a digit.

866180 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3086 + ... + 3354.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁸⁶⁶¹⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640).

866180 is an abundant number, since it is smaller than the sum of its proper divisors (1311100).

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

866180 is a wasteful number, since it uses less digits than its factorization.

866180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 866180 is about 930.6879176179. The cubic root of 866180 is about 95.3241008006.

The spelling of 866180 in words is "eight hundred sixty-six thousand, one hundred eighty".