6727681 has 8 divisors (see below), whose sum is σ = 7024680. Its totient is φ = 6435072.

The previous prime is 6727667. The next prime is 6727703. The reversal of 6727681 is 1867276.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50625 + 6677056 = 225^2 + 2584^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6727681 - 2¹¹ = 6725633 is a prime.

It is a super-2 number, since 2×6727681² = 90523383275522, which contains 22 as substring.

It is a Duffinian number.

6727681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6727681.

It is not an unprimeable number, because it can be changed into a prime (6727601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 4303.

It is an arithmetic number, because the mean of its divisors is an integer number (878085).

Almost surely, 2^6727681 is an apocalyptic number.

It is an amenable number.

6727681 is a deficient number, since it is larger than the sum of its proper divisors (296999).

6727681 is a wasteful number, since it uses less digits than its factorization.

6727681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its digits is 28224, while the sum is 37.

The square root of 6727681 is about 2593.7773613015. Note that the first 3 decimals coincide. The cubic root of 6727681 is about 188.7796298674.

The spelling of 6727681 in words is "six million, seven hundred twenty-seven thousand, six hundred eighty-one".