866000999 has 4 divisors (see below), whose sum is σ = 866060136. Its totient is φ = 865941864.

The previous prime is 866000909. The next prime is 866001011. The reversal of 866000999 is 999000668.

It is a happy number.

866000999 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 866000999 - 2⁸ = 866000743 is a prime.

It is a Duffinian number.

866000999 is a modest number, since divided by 999 gives 866 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866000909) 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, 10472 + ... + 42914.

It is an arithmetic number, because the mean of its divisors is an integer number (216515034).

Almost surely, 2^866000999 is an apocalyptic number.

866000999 is a deficient number, since it is larger than the sum of its proper divisors (59137).

866000999 is a wasteful number, since it uses less digits than its factorization.

866000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59136.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 866000999 is about 29427.8949128204. The cubic root of 866000999 is about 953.1753392659.

The spelling of 866000999 in words is "eight hundred sixty-six million, nine hundred ninety-nine", and thus it is an aban number.