11130005665 has 4 divisors (see below), whose sum is σ = 13356006804. Its totient is φ = 8904004528.

The previous prime is 11130005603. The next prime is 11130005681. The reversal of 11130005665 is 56650003111.

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 1501097536 + 9628908129 = 38744^2 + 98127^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130005665 - 2¹¹ = 11130003617 is a prime.

It is a super-2 number, since 2×11130005665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 1113000562 + ... + 1113000571.

It is an arithmetic number, because the mean of its divisors is an integer number (3339001701).

Almost surely, 2^11130005665 is an apocalyptic number.

It is an amenable number.

11130005665 is a deficient number, since it is larger than the sum of its proper divisors (2226001139).

11130005665 is an equidigital number, since it uses as much as digits as its factorization.

11130005665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226001138.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 11130005665 its reverse (56650003111), we get a palindrome (67780008776).

The spelling of 11130005665 in words is "eleven billion, one hundred thirty million, five thousand, six hundred sixty-five".