873666 has 20 divisors (see below), whose sum is σ = 1958022. Its totient is φ = 291168.

The previous prime is 873659. The next prime is 873667. The reversal of 873666 is 666378.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 531441 + 342225 = 729^2 + 585^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 873666.

It is not an unprimeable number, because it can be changed into a prime (873667) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2535 + ... + 2858.

2⁸⁷³⁶⁶⁶ is an apocalyptic number.

873666 is an abundant number, since it is smaller than the sum of its proper divisors (1084356).

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

873666 is a wasteful number, since it uses less digits than its factorization.

873666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407 (or 5398 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 873666 is about 934.7010217176. The cubic root of 873666 is about 95.5979277458.

The spelling of 873666 in words is "eight hundred seventy-three thousand, six hundred sixty-six".