866201 has 16 divisors (see below), whose sum is σ = 1088640. Its totient is φ = 672000.

The previous prime is 866197. The next prime is 866213. The reversal of 866201 is 102668.

It is not a de Polignac number, because 866201 - 2² = 866197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326 + ... + 3576.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2⁸⁶⁶²⁰¹ is an apocalyptic number.

It is an amenable number.

866201 is a deficient number, since it is larger than the sum of its proper divisors (222439).

866201 is a wasteful number, since it uses less digits than its factorization.

866201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 866201 is about 930.6991995269. The cubic root of 866201 is about 95.3248711524.

Adding to 866201 its reverse (102668), we get a palindrome (968869).

The spelling of 866201 in words is "eight hundred sixty-six thousand, two hundred one".