1166545443 has 16 divisors (see below), whose sum is σ = 1793327616. Its totient is φ = 660696960.

The previous prime is 1166545427. The next prime is 1166545447. The reversal of 1166545443 is 3445456611.

It is not a de Polignac number, because 1166545443 - 2⁴ = 1166545427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166545447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243423 + ... + 248168.

It is an arithmetic number, because the mean of its divisors is an integer number (112082976).

Almost surely, 2^1166545443 is an apocalyptic number.

1166545443 is a deficient number, since it is larger than the sum of its proper divisors (626782173).

1166545443 is a wasteful number, since it uses less digits than its factorization.

1166545443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491714.

The product of its digits is 172800, while the sum is 39.

The square root of 1166545443 is about 34154.7279743230. The cubic root of 1166545443 is about 1052.6901368098.

The spelling of 1166545443 in words is "one billion, one hundred sixty-six million, five hundred forty-five thousand, four hundred forty-three".