6709917881 has 4 divisors (see below), whose sum is σ = 6710082852. Its totient is φ = 6709752912.

The previous prime is 6709917871. The next prime is 6709917899. The reversal of 6709917881 is 1887199076.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2039425600 + 4670492281 = 45160^2 + 68341^2 .

It is a cyclic number.

It is not a de Polignac number, because 6709917881 - 2³⁰ = 5636176057 is a prime.

It is a super-2 number, since 2×6709917881² = 90045995939527060322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6709917821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26711 + ... + 118883.

It is an arithmetic number, because the mean of its divisors is an integer number (1677520713).

Almost surely, 2^6709917881 is an apocalyptic number.

It is an amenable number.

6709917881 is a deficient number, since it is larger than the sum of its proper divisors (164971).

6709917881 is an equidigital number, since it uses as much as digits as its factorization.

6709917881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164970.

The product of its (nonzero) digits is 1524096, while the sum is 56.

The square root of 6709917881 is about 81914.0884158519. The cubic root of 6709917881 is about 1886.1333826199.

The spelling of 6709917881 in words is "six billion, seven hundred nine million, nine hundred seventeen thousand, eight hundred eighty-one".