669816344 has 16 divisors (see below), whose sum is σ = 1286538120. Its totient is φ = 326739520.

The previous prime is 669816311. The next prime is 669816347. The reversal of 669816344 is 443618966.

669816344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669816347) 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, 1020734 + ... + 1021389.

Almost surely, 2^669816344 is an apocalyptic number.

It is an amenable number.

669816344 is a deficient number, since it is larger than the sum of its proper divisors (616721776).

669816344 is a wasteful number, since it uses less digits than its factorization.

669816344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042170 (or 2042166 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 669816344 is about 25880.8103428003. The cubic root of 669816344 is about 874.9540521178.

The spelling of 669816344 in words is "six hundred sixty-nine million, eight hundred sixteen thousand, three hundred forty-four".