6685855 has 24 divisors (see below), whose sum is σ = 9058896. Its totient is φ = 4730880.

The previous prime is 6685843. The next prime is 6685859. The reversal of 6685855 is 5585866.

It is not a de Polignac number, because 6685855 - 2⁵ = 6685823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

6685855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25887 + ... + 26143.

It is an arithmetic number, because the mean of its divisors is an integer number (377454).

Almost surely, 2^6685855 is an apocalyptic number.

6685855 is a deficient number, since it is larger than the sum of its proper divisors (2373041).

6685855 is a wasteful number, since it uses less digits than its factorization.

6685855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 316 counting only the distinct ones).

The product of its digits is 288000, while the sum is 43.

The square root of 6685855 is about 2585.7020323309. The cubic root of 6685855 is about 188.3876019417.

The spelling of 6685855 in words is "six million, six hundred eighty-five thousand, eight hundred fifty-five".