6811818 has 32 divisors (see below), whose sum is σ = 15313536. Its totient is φ = 2004288.

The previous prime is 6811813. The next prime is 6811829. The reversal of 6811818 is 8181186.

It is not an unprimeable number, because it can be changed into a prime (6811813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 3692.

It is an arithmetic number, because the mean of its divisors is an integer number (478548).

Almost surely, 2^6811818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6811818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7656768).

6811818 is an abundant number, since it is smaller than the sum of its proper divisors (8501718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6811818 is a wasteful number, since it uses less digits than its factorization.

6811818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838.

The product of its digits is 3072, while the sum is 33.

The square root of 6811818 is about 2609.9459764524. The cubic root of 6811818 is about 189.5633370153.

The spelling of 6811818 in words is "six million, eight hundred eleven thousand, eight hundred eighteen".