6681167786 has 16 divisors (see below), whose sum is σ = 10054607136. Its totient is φ = 3329645616.

The previous prime is 6681167783. The next prime is 6681167797. The reversal of 6681167786 is 6877611866.

It is not an unprimeable number, because it can be changed into a prime (6681167783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480145 + ... + 1484651.

It is an arithmetic number, because the mean of its divisors is an integer number (628412946).

Almost surely, 2^6681167786 is an apocalyptic number.

6681167786 is a deficient number, since it is larger than the sum of its proper divisors (3373439350).

6681167786 is a wasteful number, since it uses less digits than its factorization.

6681167786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773.

The product of its digits is 4064256, while the sum is 56.

The square root of 6681167786 is about 81738.4107136908. The cubic root of 6681167786 is about 1883.4356771143.

The spelling of 6681167786 in words is "six billion, six hundred eighty-one million, one hundred sixty-seven thousand, seven hundred eighty-six".