6811805 has 32 divisors (see below), whose sum is σ = 10983168. Its totient is φ = 3916800.

The previous prime is 6811801. The next prime is 6811813. The reversal of 6811805 is 5081186.

It is not a de Polignac number, because 6811805 - 2² = 6811801 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4325 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (343224).

Almost surely, 2^6811805 is an apocalyptic number.

6811805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6811805 is a deficient number, since it is larger than the sum of its proper divisors (4171363).

6811805 is a wasteful number, since it uses less digits than its factorization.

6811805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 6811805 is about 2609.9434859782. The cubic root of 6811805 is about 189.5632164247.

The spelling of 6811805 in words is "six million, eight hundred eleven thousand, eight hundred five".