669566936 has 16 divisors (see below), whose sum is σ = 1269545400. Its totient is φ = 331021504.

The previous prime is 669566929. The next prime is 669566939. The reversal of 669566936 is 639665966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669566939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469490 + ... + 470913.

Almost surely, 2^669566936 is an apocalyptic number.

It is an amenable number.

669566936 is a deficient number, since it is larger than the sum of its proper divisors (599978464).

669566936 is a wasteful number, since it uses less digits than its factorization.

669566936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940498 (or 940494 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 56.

The square root of 669566936 is about 25875.9914979117. The cubic root of 669566936 is about 874.8454414353.

The spelling of 669566936 in words is "six hundred sixty-nine million, five hundred sixty-six thousand, nine hundred thirty-six".