889666 has 4 divisors (see below), whose sum is σ = 1334502. Its totient is φ = 444832.

The previous prime is 889657. The next prime is 889673. The reversal of 889666 is 666988.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 52441 = 915^2 + 229^2 .

It is an Ulam number.

It is an unprimeable number.

889666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222415 + ... + 222418.

2⁸⁸⁹⁶⁶⁶ is an apocalyptic number.

889666 is a deficient number, since it is larger than the sum of its proper divisors (444836).

889666 is a wasteful number, since it uses less digits than its factorization.

889666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444835.

The product of its digits is 124416, while the sum is 43.

The square root of 889666 is about 943.2210769486. The cubic root of 889666 is about 96.1779828965.

The spelling of 889666 in words is "eight hundred eighty-nine thousand, six hundred sixty-six".