866670 has 32 divisors (see below), whose sum is σ = 2377728. Its totient is φ = 198048.

The previous prime is 866653. The next prime is 866683. The reversal of 866670 is 76668.

It is a super-2 number, since 2×866670² = 1502233777800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854 + ... + 2273.

It is an arithmetic number, because the mean of its divisors is an integer number (74304).

2⁸⁶⁶⁶⁷⁰ is an apocalyptic number.

866670 is an abundant number, since it is smaller than the sum of its proper divisors (1511058).

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

866670 is a wasteful number, since it uses less digits than its factorization.

866670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144.

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

The square root of 866670 is about 930.9511265367. The cubic root of 866670 is about 95.3420724326.

The spelling of 866670 in words is "eight hundred sixty-six thousand, six hundred seventy".