843666 has 8 divisors (see below), whose sum is σ = 1687344. Its totient is φ = 281220.

The previous prime is 843649. The next prime is 843677. The reversal of 843666 is 666348.

It is a sphenic number, since it is the product of 3 distinct primes.

843666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70300 + ... + 70311.

It is an arithmetic number, because the mean of its divisors is an integer number (210918).

2⁸⁴³⁶⁶⁶ is an apocalyptic number.

843666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

843666 is a wasteful number, since it uses less digits than its factorization.

843666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140616.

The product of its digits is 20736, while the sum is 33.

The square root of 843666 is about 918.5129285971. The cubic root of 843666 is about 94.4909428345.

The spelling of 843666 in words is "eight hundred forty-three thousand, six hundred sixty-six".