6681111168 has 32 divisors (see below), whose sum is σ = 17746702560. Its totient is φ = 2227036928.

The previous prime is 6681111131. The next prime is 6681111169. The reversal of 6681111168 is 8611111866.

It is a tau number, because it is divible by the number of its divisors (32).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6681111169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8698980 + ... + 8699747.

It is an arithmetic number, because the mean of its divisors is an integer number (554584455).

Almost surely, 2^6681111168 is an apocalyptic number.

It is an amenable number.

6681111168 is an abundant number, since it is smaller than the sum of its proper divisors (11065591392).

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

6681111168 is a wasteful number, since it uses less digits than its factorization.

6681111168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398744 (or 17398732 counting only the distinct ones).

The product of its digits is 13824, while the sum is 39.

The square root of 6681111168 is about 81738.0643763969. The cubic root of 6681111168 is about 1883.4303568536.

The spelling of 6681111168 in words is "six billion, six hundred eighty-one million, one hundred eleven thousand, one hundred sixty-eight".