6608681 has 4 divisors (see below), whose sum is σ = 6787332. Its totient is φ = 6430032.

The previous prime is 6608653. The next prime is 6608683. The reversal of 6608681 is 1868066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1868066 = 2 ⋅934033.

It can be written as a sum of positive squares in 2 ways, for example, as 6295081 + 313600 = 2509^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6608681 is a prime.

It is a super-2 number, since 2×6608681² = 87349329119522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6608683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89270 + ... + 89343.

It is an arithmetic number, because the mean of its divisors is an integer number (1696833).

Almost surely, 2^6608681 is an apocalyptic number.

It is an amenable number.

6608681 is a deficient number, since it is larger than the sum of its proper divisors (178651).

6608681 is a wasteful number, since it uses less digits than its factorization.

6608681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178650.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6608681 is about 2570.7354978683. The cubic root of 6608681 is about 187.6599500317.

The spelling of 6608681 in words is "six million, six hundred eight thousand, six hundred eighty-one".