866171 has 4 divisors (see below), whose sum is σ = 894144. Its totient is φ = 838200.

The previous prime is 866161. The next prime is 866183. The reversal of 866171 is 171668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866171 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866171.

It is not an unprimeable number, because it can be changed into a prime (866101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13940 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (223536).

2⁸⁶⁶¹⁷¹ is an apocalyptic number.

866171 is a deficient number, since it is larger than the sum of its proper divisors (27973).

866171 is a wasteful number, since it uses less digits than its factorization.

866171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27972.

The product of its digits is 2016, while the sum is 29.

The square root of 866171 is about 930.6830824722. The cubic root of 866171 is about 95.3237706461.

The spelling of 866171 in words is "eight hundred sixty-six thousand, one hundred seventy-one".