866012 has 24 divisors (see below), whose sum is σ = 1751904. Its totient is φ = 366912.

The previous prime is 866011. The next prime is 866029. The reversal of 866012 is 210668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4298 + ... + 4494.

It is an arithmetic number, because the mean of its divisors is an integer number (72996).

2⁸⁶⁶⁰¹² is an apocalyptic number.

It is an amenable number.

866012 is an abundant number, since it is smaller than the sum of its proper divisors (885892).

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

866012 is a wasteful number, since it uses less digits than its factorization.

866012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 363 counting only the distinct ones).

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

The square root of 866012 is about 930.5976574224. The cubic root of 866012 is about 95.3179375380.

The spelling of 866012 in words is "eight hundred sixty-six thousand, twelve".