6681111167 has 4 divisors (see below), whose sum is σ = 6682326816. Its totient is φ = 6679895520.

The previous prime is 6681111131. The next prime is 6681111169. The reversal of 6681111167 is 7611111866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7611111866 = 2 ⋅3805555933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681111167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6681111167.

It is a congruent number.

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, 599543 + ... + 610584.

It is an arithmetic number, because the mean of its divisors is an integer number (1670581704).

Almost surely, 2^6681111167 is an apocalyptic number.

6681111167 is a deficient number, since it is larger than the sum of its proper divisors (1215649).

6681111167 is a wasteful number, since it uses less digits than its factorization.

6681111167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215648.

The product of its digits is 12096, while the sum is 38.

The square root of 6681111167 is about 81738.0643702798. The cubic root of 6681111167 is about 1883.4303567596.

The spelling of 6681111167 in words is "six billion, six hundred eighty-one million, one hundred eleven thousand, one hundred sixty-seven".