11085661 has 4 divisors (see below), whose sum is σ = 11134300. Its totient is φ = 11037024.

The previous prime is 11085611. The next prime is 11085673. The reversal of 11085661 is 16658011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16658011 = 17 ⋅979883.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 235225 = 3294^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 11085661 - 2¹¹ = 11083613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11085611) 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, 23976 + ... + 24433.

It is an arithmetic number, because the mean of its divisors is an integer number (2783575).

Almost surely, 2^11085661 is an apocalyptic number.

It is an amenable number.

11085661 is a deficient number, since it is larger than the sum of its proper divisors (48639).

11085661 is an equidigital number, since it uses as much as digits as its factorization.

11085661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48638.

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

The square root of 11085661 is about 3329.5136281445. The cubic root of 11085661 is about 222.9738150195.

The spelling of 11085661 in words is "eleven million, eighty-five thousand, six hundred sixty-one".