866634 has 8 divisors (see below), whose sum is σ = 1733280. Its totient is φ = 288876.

The previous prime is 866629. The next prime is 866639. The reversal of 866634 is 436668.

866634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (866629) and next prime (866639).

It is a sphenic number, since it is the product of 3 distinct primes.

866634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 866595 and 866604.

It is not an unprimeable number, because it can be changed into a prime (866639) by changing a digit.

866634 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 3 ways as a sum of consecutive naturals, for example, 72214 + ... + 72225.

It is an arithmetic number, because the mean of its divisors is an integer number (216660).

2⁸⁶⁶⁶³⁴ is an apocalyptic number.

866634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866634 is a wasteful number, since it uses less digits than its factorization.

866634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144444.

The product of its digits is 20736, while the sum is 33.

The square root of 866634 is about 930.9317912715. The cubic root of 866634 is about 95.3407522983.

The spelling of 866634 in words is "eight hundred sixty-six thousand, six hundred thirty-four".