1166445849 has 4 divisors (see below), whose sum is σ = 1555261136. Its totient is φ = 777630564.

The previous prime is 1166445817. The next prime is 1166445887. The reversal of 1166445849 is 9485446611.

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 1166445849 - 2⁵ = 1166445817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166445798 and 1166445807.

It is not an unprimeable number, because it can be changed into a prime (1166445809) 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, 194407639 + ... + 194407644.

It is an arithmetic number, because the mean of its divisors is an integer number (388815284).

Almost surely, 2^1166445849 is an apocalyptic number.

It is an amenable number.

1166445849 is a deficient number, since it is larger than the sum of its proper divisors (388815287).

1166445849 is an equidigital number, since it uses as much as digits as its factorization.

1166445849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388815286.

The product of its digits is 829440, while the sum is 48.

The square root of 1166445849 is about 34153.2699605762. The cubic root of 1166445849 is about 1052.6601780954.

The spelling of 1166445849 in words is "one billion, one hundred sixty-six million, four hundred forty-five thousand, eight hundred forty-nine".