866633 has 4 divisors (see below), whose sum is σ = 885120. Its totient is φ = 848148.

The previous prime is 866629. The next prime is 866639. The reversal of 866633 is 336668.

It is a happy number.

866633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866633 - 2² = 866629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 866633.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866633.

It is not an unprimeable number, because it can be changed into a prime (866639) 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, 9173 + ... + 9266.

It is an arithmetic number, because the mean of its divisors is an integer number (221280).

2⁸⁶⁶⁶³³ is an apocalyptic number.

It is an amenable number.

866633 is a deficient number, since it is larger than the sum of its proper divisors (18487).

866633 is a wasteful number, since it uses less digits than its factorization.

866633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18486.

The product of its digits is 15552, while the sum is 32.

The square root of 866633 is about 930.9312541751. The cubic root of 866633 is about 95.3407156274.

The spelling of 866633 in words is "eight hundred sixty-six thousand, six hundred thirty-three".