669606 has 32 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 188256.

The previous prime is 669577. The next prime is 669607. The reversal of 669606 is 606966.

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 669606.

It is not an unprimeable number, because it can be changed into a prime (669607) 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 15 ways as a sum of consecutive naturals, for example, 4420 + ... + 4568.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁶⁶⁹⁶⁰⁶ is an apocalyptic number.

669606 is an abundant number, since it is smaller than the sum of its proper divisors (885594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669606 is a wasteful number, since it uses less digits than its factorization.

669606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 669606 is about 818.2945679888. The cubic root of 669606 is about 87.4862454570.

It can be divided in two parts, 66960 and 6, that added together give a palindrome (66966).

The spelling of 669606 in words is "six hundred sixty-nine thousand, six hundred six".