669405325 has 6 divisors (see below), whose sum is σ = 830062634. Its totient is φ = 535524240.

The previous prime is 669405313. The next prime is 669405329. The reversal of 669405325 is 523504966.

669405325 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 3 ways, for example, as 78623689 + 590781636 = 8867^2 + 24306^2 .

It is not a de Polignac number, because 669405325 - 2¹¹ = 669403277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669405329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13388082 + ... + 13388131.

Almost surely, 2^669405325 is an apocalyptic number.

It is an amenable number.

669405325 is a deficient number, since it is larger than the sum of its proper divisors (160657309).

669405325 is a wasteful number, since it uses less digits than its factorization.

669405325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26776223 (or 26776218 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 669405325 is about 25872.8685112417. The cubic root of 669405325 is about 874.7750496563.

The spelling of 669405325 in words is "six hundred sixty-nine million, four hundred five thousand, three hundred twenty-five".