885661 has 8 divisors (see below), whose sum is σ = 1056384. Its totient is φ = 726000.

The previous prime is 885623. The next prime is 885679. The reversal of 885661 is 166588.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 885661 - 2¹¹ = 883613 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (885611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2590 + ... + 2911.

It is an arithmetic number, because the mean of its divisors is an integer number (132048).

2⁸⁸⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

885661 is a deficient number, since it is larger than the sum of its proper divisors (170723).

885661 is a wasteful number, since it uses less digits than its factorization.

885661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531.

The product of its digits is 11520, while the sum is 34.

The square root of 885661 is about 941.0956380730. The cubic root of 885661 is about 96.0334446550.

The spelling of 885661 in words is "eight hundred eighty-five thousand, six hundred sixty-one".