10681681 has 4 divisors (see below), whose sum is σ = 10695664. Its totient is φ = 10667700.

The previous prime is 10681679. The next prime is 10681687. The reversal of 10681681 is 18618601.

It is a happy number.

10681681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10681681 - 2¹ = 10681679 is a prime.

It is a super-2 number, since 2×10681681² = 228196617971522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10681687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5775 + ... + 7396.

It is an arithmetic number, because the mean of its divisors is an integer number (2673916).

Almost surely, 2^10681681 is an apocalyptic number.

It is an amenable number.

10681681 is a deficient number, since it is larger than the sum of its proper divisors (13983).

10681681 is an equidigital number, since it uses as much as digits as its factorization.

10681681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13982.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 10681681 is about 3268.2841063775. The cubic root of 10681681 is about 220.2317186627.

The spelling of 10681681 in words is "ten million, six hundred eighty-one thousand, six hundred eighty-one".