1166164543 has 4 divisors (see below), whose sum is σ = 1166425560. Its totient is φ = 1165903528.

The previous prime is 1166164499. The next prime is 1166164553. The reversal of 1166164543 is 3454616611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3454616611 = 27733 ⋅124567.

It is a cyclic number.

It is not a de Polignac number, because 1166164543 - 2⁹ = 1166164031 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 (1166164553) 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, 123688 + ... + 132781.

It is an arithmetic number, because the mean of its divisors is an integer number (291606390).

Almost surely, 2^1166164543 is an apocalyptic number.

1166164543 is a deficient number, since it is larger than the sum of its proper divisors (261017).

1166164543 is an equidigital number, since it uses as much as digits as its factorization.

1166164543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261016.

The product of its digits is 51840, while the sum is 37.

The square root of 1166164543 is about 34149.1514243034. The cubic root of 1166164543 is about 1052.5755496685.

The spelling of 1166164543 in words is "one billion, one hundred sixty-six million, one hundred sixty-four thousand, five hundred forty-three".