669443344 has 10 divisors (see below), whose sum is σ = 1297046510. Its totient is φ = 334721664.

The previous prime is 669443339. The next prime is 669443347. The reversal of 669443344 is 443344966.

669443344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 550371600 + 119071744 = 23460^2 + 10912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 669443344.

It is not an unprimeable number, because it can be changed into a prime (669443347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20920089 + ... + 20920120.

It is an arithmetic number, because the mean of its divisors is an integer number (129704651).

Almost surely, 2^669443344 is an apocalyptic number.

It is an amenable number.

669443344 is a deficient number, since it is larger than the sum of its proper divisors (627603166).

669443344 is a wasteful number, since it uses less digits than its factorization.

669443344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41840217 (or 41840211 counting only the distinct ones).

The product of its digits is 746496, while the sum is 43.

The square root of 669443344 is about 25873.6032280005. The cubic root of 669443344 is about 874.7916103467.

The spelling of 669443344 in words is "six hundred sixty-nine million, four hundred forty-three thousand, three hundred forty-four".