886661 has 4 divisors (see below), whose sum is σ = 889824. Its totient is φ = 883500.

The previous prime is 886651. The next prime is 886663. The reversal of 886661 is 166688.

886661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 886661 - 2¹⁸ = 624517 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (886663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115 + ... + 1736.

It is an arithmetic number, because the mean of its divisors is an integer number (222456).

2⁸⁸⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

886661 is a deficient number, since it is larger than the sum of its proper divisors (3163).

886661 is a wasteful number, since it uses less digits than its factorization.

886661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162.

The product of its digits is 13824, while the sum is 35.

The square root of 886661 is about 941.6267838162. The cubic root of 886661 is about 96.0695748536.

The spelling of 886661 in words is "eight hundred eighty-six thousand, six hundred sixty-one".