669885525 has 48 divisors (see below), whose sum is σ = 1237629120. Its totient is φ = 355233600.

The previous prime is 669885509. The next prime is 669885547. The reversal of 669885525 is 525588966.

669885525 is a `hidden beast` number, since 6 + 6 + 9 + 88 + 552 + 5 = 666.

It is not a de Polignac number, because 669885525 - 2⁴ = 669885509 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 119434 + ... + 124916.

It is an arithmetic number, because the mean of its divisors is an integer number (25783940).

Almost surely, 2^669885525 is an apocalyptic number.

It is an amenable number.

669885525 is a deficient number, since it is larger than the sum of its proper divisors (567743595).

669885525 is a wasteful number, since it uses less digits than its factorization.

669885525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5672 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 669885525 is about 25882.1468390858. The cubic root of 669885525 is about 874.9841738634.

The spelling of 669885525 in words is "six hundred sixty-nine million, eight hundred eighty-five thousand, five hundred twenty-five".