6716511881 has 2 divisors, whose sum is σ = 6716511882. Its totient is φ = 6716511880.

The previous prime is 6716511877. The next prime is 6716511887. The reversal of 6716511881 is 1881156176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4188031225 + 2528480656 = 64715^2 + 50284^2 .

It is a cyclic number.

It is not a de Polignac number, because 6716511881 - 2² = 6716511877 is a prime.

It is a super-2 number, since 2×6716511881² = 90223063695228316322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6716511887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358255940 + 3358255941.

It is an arithmetic number, because the mean of its divisors is an integer number (3358255941).

Almost surely, 2^6716511881 is an apocalyptic number.

It is an amenable number.

6716511881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6716511881 is an equidigital number, since it uses as much as digits as its factorization.

6716511881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 44.

The square root of 6716511881 is about 81954.3280187203. The cubic root of 6716511881 is about 1886.7510301017.

The spelling of 6716511881 in words is "six billion, seven hundred sixteen million, five hundred eleven thousand, eight hundred eighty-one".