669585 has 24 divisors (see below), whose sum is σ = 1247616. Its totient is φ = 305760.

The previous prime is 669577. The next prime is 669607. The reversal of 669585 is 585966.

669585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669585 - 2³ = 669577 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (51984).

2⁶⁶⁹⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

669585 is a deficient number, since it is larger than the sum of its proper divisors (578031).

669585 is a wasteful number, since it uses less digits than its factorization.

669585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 926 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 669585 is about 818.2817363231. The cubic root of 669585 is about 87.4853308742.

The spelling of 669585 in words is "six hundred sixty-nine thousand, five hundred eighty-five".