6716886671389 has 2 divisors, whose sum is σ = 6716886671390. Its totient is φ = 6716886671388.

The previous prime is 6716886671353. The next prime is 6716886671431. The reversal of 6716886671389 is 9831766886176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4005321768900 + 2711564902489 = 2001330^2 + 1646683^2 .

It is a cyclic number.

It is not a de Polignac number, because 6716886671389 - 2⁹ = 6716886670877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6716886674389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358443335694 + 3358443335695.

It is an arithmetic number, because the mean of its divisors is an integer number (3358443335695).

Almost surely, 2^{6716886671389} is an apocalyptic number.

It is an amenable number.

6716886671389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6716886671389 is an equidigital number, since it uses as much as digits as its factorization.

6716886671389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 877879296, while the sum is 76.

The spelling of 6716886671389 in words is "six trillion, seven hundred sixteen billion, eight hundred eighty-six million, six hundred seventy-one thousand, three hundred eighty-nine".