11065681 has 4 divisors (see below), whose sum is σ = 12071664. Its totient is φ = 10059700.

The previous prime is 11065673. The next prime is 11065693. The reversal of 11065681 is 18656011.

11065681 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, and also an emirpimes, since its reverse is a distinct semiprime: 18656011 = 11 ⋅1696001.

It is a cyclic number.

It is not a de Polignac number, because 11065681 - 2³ = 11065673 is a prime.

It is a super-2 number, since 2×11065681² = 244898591987522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11075681) 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, 502975 + ... + 502996.

It is an arithmetic number, because the mean of its divisors is an integer number (3017916).

Almost surely, 2^11065681 is an apocalyptic number.

11065681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11065681 is a deficient number, since it is larger than the sum of its proper divisors (1005983).

11065681 is a wasteful number, since it uses less digits than its factorization.

11065681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005982.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11065681 is about 3326.5118367443. The cubic root of 11065681 is about 222.8397771251.

The spelling of 11065681 in words is "eleven million, sixty-five thousand, six hundred eighty-one".