890666 has 16 divisors (see below), whose sum is σ = 1543104. Its totient is φ = 377664.

The previous prime is 890657. The next prime is 890671. The reversal of 890666 is 666098.

It is an unprimeable number.

890666 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 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (96444).

2⁸⁹⁰⁶⁶⁶ is an apocalyptic number.

890666 is a deficient number, since it is larger than the sum of its proper divisors (652438).

890666 is a wasteful number, since it uses less digits than its factorization.

890666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 890666 is about 943.7510264895. The cubic root of 890666 is about 96.2140046433.

The spelling of 890666 in words is "eight hundred ninety thousand, six hundred sixty-six".