665006 has 8 divisors (see below), whose sum is σ = 1056240. Its totient is φ = 312928.

The previous prime is 664997. The next prime is 665011. The reversal of 665006 is 600566.

It is a happy number.

665006 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 an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9746 + ... + 9813.

It is an arithmetic number, because the mean of its divisors is an integer number (132030).

2⁶⁶⁵⁰⁰⁶ is an apocalyptic number.

665006 is a deficient number, since it is larger than the sum of its proper divisors (391234).

665006 is a wasteful number, since it uses less digits than its factorization.

665006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19578.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 665006 is about 815.4790003427. The cubic root of 665006 is about 87.2854498629.

The spelling of 665006 in words is "six hundred sixty-five thousand, six".