669590 has 8 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 267832.

The previous prime is 669577. The next prime is 669607. The reversal of 669590 is 95966.

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

It is a self number, because there is not a number n which added to its sum of digits gives 669590.

It is a congruent number.

It is an unprimeable number.

669590 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 3 ways as a sum of consecutive naturals, for example, 33470 + ... + 33489.

It is an arithmetic number, because the mean of its divisors is an integer number (150660).

2⁶⁶⁹⁵⁹⁰ is an apocalyptic number.

669590 is a deficient number, since it is larger than the sum of its proper divisors (535690).

669590 is a wasteful number, since it uses less digits than its factorization.

669590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66966.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 669590 is about 818.2847914999. The cubic root of 669590 is about 87.4855486338.

It can be divided in two parts, 6 and 69590, that added together give a palindrome (69596).

The spelling of 669590 in words is "six hundred sixty-nine thousand, five hundred ninety".