6681111 has 8 divisors (see below), whose sum is σ = 8928000. Its totient is φ = 4444152.

The previous prime is 6681071. The next prime is 6681133. The reversal of 6681111 is 1111866.

6681111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6681111 - 2¹⁰ = 6680087 is a prime.

6681111 is a modest number, since divided by 1111 gives 668 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681161) 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, 735 + ... + 3728.

It is an arithmetic number, because the mean of its divisors is an integer number (1116000).

Almost surely, 2^6681111 is an apocalyptic number.

6681111 is a deficient number, since it is larger than the sum of its proper divisors (2246889).

6681111 is a wasteful number, since it uses less digits than its factorization.

6681111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965.

The product of its digits is 288, while the sum is 24.

The square root of 6681111 is about 2584.7845171310. The cubic root of 6681111 is about 188.3430341067.

Adding to 6681111 its reverse (1111866), we get a palindrome (7792977).

The spelling of 6681111 in words is "six million, six hundred eighty-one thousand, one hundred eleven".