810668 has 6 divisors (see below), whose sum is σ = 1418676. Its totient is φ = 405332.

The previous prime is 810659. The next prime is 810671. The reversal of 810668 is 866018.

It is a self number, because there is not a number n which added to its sum of digits gives 810668.

It is an unprimeable number.

810668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101330 + ... + 101337.

It is an arithmetic number, because the mean of its divisors is an integer number (236446).

2⁸¹⁰⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

810668 is a deficient number, since it is larger than the sum of its proper divisors (608008).

810668 is a wasteful number, since it uses less digits than its factorization.

810668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202671 (or 202669 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 810668 is about 900.3710346296. The cubic root of 810668 is about 93.2425932155.

The spelling of 810668 in words is "eight hundred ten thousand, six hundred sixty-eight".