842664 has 16 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 280880.

The previous prime is 842657. The next prime is 842701. The reversal of 842664 is 466248.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

842664 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 in 3 ways as a sum of consecutive naturals, for example, 17532 + ... + 17579.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2⁸⁴²⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

842664 is an abundant number, since it is smaller than the sum of its proper divisors (1264056).

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

842664 is a wasteful number, since it uses less digits than its factorization.

842664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35120 (or 35116 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 842664 is about 917.9673196797. The cubic root of 842664 is about 94.4535198763.

The spelling of 842664 in words is "eight hundred forty-two thousand, six hundred sixty-four".