1166611227 has 4 divisors (see below), whose sum is σ = 1555481640. Its totient is φ = 777740816.

The previous prime is 1166611223. The next prime is 1166611279. The reversal of 1166611227 is 7221166611.

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

It is a cyclic number.

It is not a de Polignac number, because 1166611227 - 2² = 1166611223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166611223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194435202 + ... + 194435207.

It is an arithmetic number, because the mean of its divisors is an integer number (388870410).

Almost surely, 2^1166611227 is an apocalyptic number.

1166611227 is a deficient number, since it is larger than the sum of its proper divisors (388870413).

1166611227 is an equidigital number, since it uses as much as digits as its factorization.

1166611227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388870412.

The product of its digits is 6048, while the sum is 33.

The square root of 1166611227 is about 34155.6909899361. The cubic root of 1166611227 is about 1052.7099242562.

Adding to 1166611227 its reverse (7221166611), we get a palindrome (8387777838).

The spelling of 1166611227 in words is "one billion, one hundred sixty-six million, six hundred eleven thousand, two hundred twenty-seven".