8065681 has 4 divisors (see below), whose sum is σ = 8686132. Its totient is φ = 7445232.

The previous prime is 8065679. The next prime is 8065693. The reversal of 8065681 is 1865608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 6890625 = 1084^2 + 2625^2 .

It is a cyclic number.

It is not a de Polignac number, because 8065681 - 2¹ = 8065679 is a prime.

It is a super-2 number, since 2×8065681² = 130110419987522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8065081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310206 + ... + 310231.

It is an arithmetic number, because the mean of its divisors is an integer number (2171533).

Almost surely, 2^8065681 is an apocalyptic number.

It is an amenable number.

8065681 is a deficient number, since it is larger than the sum of its proper divisors (620451).

8065681 is a wasteful number, since it uses less digits than its factorization.

8065681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620450.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 8065681 is about 2840.0142605276. The cubic root of 8065681 is about 200.5458505473.

It can be divided in two parts, 80656 and 81, that multiplied together give a square (6533136 = 2556²).

The spelling of 8065681 in words is "eight million, sixty-five thousand, six hundred eighty-one".