669584 has 10 divisors (see below), whose sum is σ = 1297350. Its totient is φ = 334784.

The previous prime is 669577. The next prime is 669607. The reversal of 669584 is 485966.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 29584 = 800^2 + 172^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20909 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (129735).

2⁶⁶⁹⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

669584 is a deficient number, since it is larger than the sum of its proper divisors (627766).

669584 is a wasteful number, since it uses less digits than its factorization.

669584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41857 (or 41851 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 669584 is about 818.2811252864. The cubic root of 669584 is about 87.4852873222.

The spelling of 669584 in words is "six hundred sixty-nine thousand, five hundred eighty-four".