806660 has 24 divisors (see below), whose sum is σ = 1728216. Its totient is φ = 316160.

The previous prime is 806657. The next prime is 806671. The reversal of 806660 is 66608.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 802816 = 62^2 + 896^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 1440.

It is an arithmetic number, because the mean of its divisors is an integer number (72009).

2⁸⁰⁶⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

806660 is an abundant number, since it is smaller than the sum of its proper divisors (921556).

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

806660 is a wasteful number, since it uses less digits than its factorization.

806660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 806660 is about 898.1425276647. The cubic root of 806660 is about 93.0886732778.

The spelling of 806660 in words is "eight hundred six thousand, six hundred sixty".