685565585 has 8 divisors (see below), whose sum is σ = 830367936. Its totient is φ = 543326320.

The previous prime is 685565567. The next prime is 685565593. The reversal of 685565585 is 585565586.

685565585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685565585 - 2⁸ = 685565329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640181 + ... + 641250.

It is an arithmetic number, because the mean of its divisors is an integer number (103795992).

Almost surely, 2^685565585 is an apocalyptic number.

It is an amenable number.

685565585 is a deficient number, since it is larger than the sum of its proper divisors (144802351).

685565585 is a wasteful number, since it uses less digits than its factorization.

685565585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281543.

The product of its digits is 7200000, while the sum is 53.

The square root of 685565585 is about 26183.3073732101. The cubic root of 685565585 is about 881.7585294240.

Subtracting from 685565585 its reverse (585565586), we obtain a palindrome (99999999).

The spelling of 685565585 in words is "six hundred eighty-five million, five hundred sixty-five thousand, five hundred eighty-five".