870666 has 24 divisors (see below), whose sum is σ = 1811232. Its totient is φ = 279000.

The previous prime is 870643. The next prime is 870679. The reversal of 870666 is 666078.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5691 + ... + 5841.

It is an arithmetic number, because the mean of its divisors is an integer number (75468).

2⁸⁷⁰⁶⁶⁶ is an apocalyptic number.

870666 is an abundant number, since it is smaller than the sum of its proper divisors (940566).

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

870666 is a wasteful number, since it uses less digits than its factorization.

870666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 870666 is about 933.0948504841. The cubic root of 870666 is about 95.4883806665.

The spelling of 870666 in words is "eight hundred seventy thousand, six hundred sixty-six".