6716681 has 2 divisors, whose sum is σ = 6716682. Its totient is φ = 6716680.

The previous prime is 6716653. The next prime is 6716687. The reversal of 6716681 is 1866176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6375625 + 341056 = 2525^2 + 584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6716681 is a prime.

It is a super-2 number, since 2×6716681² = 90227607311522, which contains 22 as substring.

It is equal to p₄₅₈₅₈₅ and since 6716681 and 458585 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6716687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358340 + 3358341.

It is an arithmetic number, because the mean of its divisors is an integer number (3358341).

Almost surely, 2^6716681 is an apocalyptic number.

It is an amenable number.

6716681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6716681 is an equidigital number, since it uses as much as digits as its factorization.

6716681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 6716681 is about 2591.6560342762. The cubic root of 6716681 is about 188.6766865840.

The spelling of 6716681 in words is "six million, seven hundred sixteen thousand, six hundred eighty-one".