6888138663 has 16 divisors (see below), whose sum is σ = 10526297600. Its totient is φ = 3924796896.

The previous prime is 6888138619. The next prime is 6888138671. The reversal of 6888138663 is 3668318886.

It is a happy number.

It is not a de Polignac number, because 6888138663 - 2³⁰ = 5814396839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6888138563) 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 15 ways as a sum of consecutive naturals, for example, 462595 + ... + 477252.

It is an arithmetic number, because the mean of its divisors is an integer number (657893600).

Almost surely, 2^6888138663 is an apocalyptic number.

6888138663 is a deficient number, since it is larger than the sum of its proper divisors (3638158937).

6888138663 is a wasteful number, since it uses less digits than its factorization.

6888138663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940206.

The product of its digits is 7962624, while the sum is 57.

The square root of 6888138663 is about 82994.8110606922. The cubic root of 6888138663 is about 1902.6867495341.

The spelling of 6888138663 in words is "six billion, eight hundred eighty-eight million, one hundred thirty-eight thousand, six hundred sixty-three".