685585585 has 8 divisors (see below), whose sum is σ = 834290496. Its totient is φ = 540743280.

The previous prime is 685585583. The next prime is 685585591. The reversal of 685585585 is 585585586.

685585585 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 685585585 - 2¹ = 685585583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685585583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965259 + ... + 965968.

It is an arithmetic number, because the mean of its divisors is an integer number (104286312).

Almost surely, 2^685585585 is an apocalyptic number.

It is an amenable number.

685585585 is a deficient number, since it is larger than the sum of its proper divisors (148704911).

685585585 is a wasteful number, since it uses less digits than its factorization.

685585585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931303.

The product of its digits is 9600000, while the sum is 55.

The square root of 685585585 is about 26183.6892931458. The cubic root of 685585585 is about 881.7671038525.

Subtracting from 685585585 its reverse (585585586), we obtain a palindrome (99999999).

The spelling of 685585585 in words is "six hundred eighty-five million, five hundred eighty-five thousand, five hundred eighty-five".