11081665 has 16 divisors (see below), whose sum is σ = 15252480. Its totient is φ = 7571520.

The previous prime is 11081647. The next prime is 11081689. The reversal of 11081665 is 56618011.

It is not a de Polignac number, because 11081665 - 2⁵ = 11081633 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16435 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (953280).

Almost surely, 2^11081665 is an apocalyptic number.

It is an amenable number.

11081665 is a deficient number, since it is larger than the sum of its proper divisors (4170815).

11081665 is an equidigital number, since it uses as much as digits as its factorization.

11081665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

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

The square root of 11081665 is about 3328.9134864096. The cubic root of 11081665 is about 222.9470203327.

Adding to 11081665 its reverse (56618011), we get a palindrome (67699676).

The spelling of 11081665 in words is "eleven million, eighty-one thousand, six hundred sixty-five".