11105001665 has 4 divisors (see below), whose sum is σ = 13326002004. Its totient is φ = 8884001328.

The previous prime is 11105001571. The next prime is 11105001689. The reversal of 11105001665 is 56610050111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7279331761 + 3825669904 = 85319^2 + 61852^2 .

It is a cyclic number.

It is not a de Polignac number, because 11105001665 - 2¹⁸ = 11104739521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110500162 + ... + 1110500171.

It is an arithmetic number, because the mean of its divisors is an integer number (3331500501).

Almost surely, 2^11105001665 is an apocalyptic number.

It is an amenable number.

11105001665 is a deficient number, since it is larger than the sum of its proper divisors (2221000339).

11105001665 is an equidigital number, since it uses as much as digits as its factorization.

11105001665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221000338.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 11105001665 its reverse (56610050111), we get a palindrome (67715051776).

The spelling of 11105001665 in words is "eleven billion, one hundred five million, one thousand, six hundred sixty-five".