1166185013 has 4 divisors (see below), whose sum is σ = 1332782880. Its totient is φ = 999587148.

The previous prime is 1166184979. The next prime is 1166185043. The reversal of 1166185013 is 3105816611.

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 not a de Polignac number, because 1166185013 - 2⁶ = 1166184949 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 (1166185043) 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, 83298923 + ... + 83298936.

It is an arithmetic number, because the mean of its divisors is an integer number (333195720).

Almost surely, 2^1166185013 is an apocalyptic number.

It is an amenable number.

1166185013 is a deficient number, since it is larger than the sum of its proper divisors (166597867).

1166185013 is an equidigital number, since it uses as much as digits as its factorization.

1166185013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166597866.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1166185013 is about 34149.4511376098. The cubic root of 1166185013 is about 1052.5817083464.

The spelling of 1166185013 in words is "one billion, one hundred sixty-six million, one hundred eighty-five thousand, thirteen".