669908 has 12 divisors (see below), whose sum is σ = 1178100. Its totient is φ = 333312.

The previous prime is 669901. The next prime is 669913. The reversal of 669908 is 809966.

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 283024 = 622^2 + 532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268 + ... + 1716.

It is an arithmetic number, because the mean of its divisors is an integer number (98175).

2⁶⁶⁹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

669908 is a deficient number, since it is larger than the sum of its proper divisors (508192).

669908 is a wasteful number, since it uses less digits than its factorization.

669908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 669908 is about 818.4790773135. The cubic root of 669908 is about 87.4993959142.

The spelling of 669908 in words is "six hundred sixty-nine thousand, nine hundred eight".