666085 has 8 divisors (see below), whose sum is σ = 913536. Its totient is φ = 456720.

The previous prime is 666079. The next prime is 666089. The reversal of 666085 is 580666.

666085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 666085 - 2⁹ = 665573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9481 + ... + 9550.

It is an arithmetic number, because the mean of its divisors is an integer number (114192).

2⁶⁶⁶⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

666085 is a deficient number, since it is larger than the sum of its proper divisors (247451).

666085 is a wasteful number, since it uses less digits than its factorization.

666085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19043.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 666085 is about 816.1403065650. The cubic root of 666085 is about 87.3326324491.

The spelling of 666085 in words is "six hundred sixty-six thousand, eighty-five".