6685005865 has 8 divisors (see below), whose sum is σ = 8023016448. Its totient is φ = 5347331760.

The previous prime is 6685005857. The next prime is 6685005883. The reversal of 6685005865 is 5685005866.

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

It is not a de Polignac number, because 6685005865 - 2³ = 6685005857 is a prime.

It is a Duffinian number.

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, 38121 + ... + 121750.

It is an arithmetic number, because the mean of its divisors is an integer number (1002877056).

Almost surely, 2^6685005865 is an apocalyptic number.

It is an amenable number.

6685005865 is a deficient number, since it is larger than the sum of its proper divisors (1338010583).

6685005865 is a wasteful number, since it uses less digits than its factorization.

6685005865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168239.

The product of its (nonzero) digits is 1728000, while the sum is 49.

The square root of 6685005865 is about 81761.8851605074. The cubic root of 6685005865 is about 1883.7962623380.

Subtracting from 6685005865 its reverse (5685005866), we obtain a palindrome (999999999).

The spelling of 6685005865 in words is "six billion, six hundred eighty-five million, five thousand, eight hundred sixty-five".