6888138671 has 2 divisors, whose sum is σ = 6888138672. Its totient is φ = 6888138670.

The previous prime is 6888138619. The next prime is 6888138689. The reversal of 6888138671 is 1768318886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6888138671 - 2²⁶ = 6821029807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6888138871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444069335 + 3444069336.

It is an arithmetic number, because the mean of its divisors is an integer number (3444069336).

Almost surely, 2^6888138671 is an apocalyptic number.

6888138671 is a deficient number, since it is larger than the sum of its proper divisors (1).

6888138671 is an equidigital number, since it uses as much as digits as its factorization.

6888138671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 56.

The square root of 6888138671 is about 82994.8111088880. The cubic root of 6888138671 is about 1902.6867502707.

The spelling of 6888138671 in words is "six billion, eight hundred eighty-eight million, one hundred thirty-eight thousand, six hundred seventy-one".