669584208 has 20 divisors (see below), whose sum is σ = 1729759328. Its totient is φ = 223194720.

The previous prime is 669584189. The next prime is 669584213. The reversal of 669584208 is 802485966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13949671 = 669584208 / (6 + 6 + 9 + 5 + 8 + 4 + 2 + 0 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6974788 + ... + 6974883.

Almost surely, 2^669584208 is an apocalyptic number.

It is an amenable number.

669584208 is an abundant number, since it is smaller than the sum of its proper divisors (1060175120).

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

669584208 is a wasteful number, since it uses less digits than its factorization.

669584208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13949682 (or 13949676 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 669584208 is about 25876.3252414248. The cubic root of 669584208 is about 874.8529638102.

The spelling of 669584208 in words is "six hundred sixty-nine million, five hundred eighty-four thousand, two hundred eight".