6811663 has 8 divisors (see below), whose sum is σ = 7146432. Its totient is φ = 6484896.

The previous prime is 6811639. The next prime is 6811667. The reversal of 6811663 is 3661186.

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

It is a cyclic number.

It is not a de Polignac number, because 6811663 - 2¹³ = 6803471 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811667) 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 7 ways as a sum of consecutive naturals, for example, 220 + ... + 3697.

It is an arithmetic number, because the mean of its divisors is an integer number (893304).

Almost surely, 2^6811663 is an apocalyptic number.

6811663 is a deficient number, since it is larger than the sum of its proper divisors (334769).

6811663 is a wasteful number, since it uses less digits than its factorization.

6811663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its digits is 5184, while the sum is 31.

The square root of 6811663 is about 2609.9162821822. The cubic root of 6811663 is about 189.5618991936.

The spelling of 6811663 in words is "six million, eight hundred eleven thousand, six hundred sixty-three".