11134720661 has 4 divisors (see below), whose sum is σ = 11323444800. Its totient is φ = 10945996524.

The previous prime is 11134720643. The next prime is 11134720679. The reversal of 11134720661 is 16602743111.

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.

It is an interprime number because it is at equal distance from previous prime (11134720643) and next prime (11134720679).

It is a cyclic number.

It is not a de Polignac number, because 11134720661 - 2¹⁰ = 11134719637 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 (11134720361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94361981 + ... + 94362098.

It is an arithmetic number, because the mean of its divisors is an integer number (2830861200).

Almost surely, 2^11134720661 is an apocalyptic number.

It is an amenable number.

11134720661 is a deficient number, since it is larger than the sum of its proper divisors (188724139).

11134720661 is an equidigital number, since it uses as much as digits as its factorization.

11134720661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188724138.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 11134720661 in words is "eleven billion, one hundred thirty-four million, seven hundred twenty thousand, six hundred sixty-one".