669085 has 8 divisors (see below), whose sum is σ = 845280. Its totient is φ = 507024.

The previous prime is 669077. The next prime is 669089. The reversal of 669085 is 580966.

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

It is a cyclic number.

It is not a de Polignac number, because 669085 - 2³ = 669077 is a prime.

669085 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 669085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669089) by changing a digit.

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, 3427 + ... + 3616.

It is an arithmetic number, because the mean of its divisors is an integer number (105660).

2⁶⁶⁹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

669085 is a deficient number, since it is larger than the sum of its proper divisors (176195).

669085 is a wasteful number, since it uses less digits than its factorization.

669085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 669085 is about 817.9761610218. The cubic root of 669085 is about 87.4635494435.

The spelling of 669085 in words is "six hundred sixty-nine thousand, eighty-five".