11166727281 has 4 divisors (see below), whose sum is σ = 14888969712. Its totient is φ = 7444484852.

The previous prime is 11166727277. The next prime is 11166727301. The reversal of 11166727281 is 18272766111.

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 a cyclic number.

It is not a de Polignac number, because 11166727281 - 2² = 11166727277 is a prime.

It is a super-2 number, since 2×11166727281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11166727261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861121211 + ... + 1861121216.

It is an arithmetic number, because the mean of its divisors is an integer number (3722242428).

Almost surely, 2^11166727281 is an apocalyptic number.

It is an amenable number.

11166727281 is a deficient number, since it is larger than the sum of its proper divisors (3722242431).

11166727281 is an equidigital number, since it uses as much as digits as its factorization.

11166727281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722242430.

The product of its digits is 56448, while the sum is 42.

The spelling of 11166727281 in words is "eleven billion, one hundred sixty-six million, seven hundred twenty-seven thousand, two hundred eighty-one".