166744716743089 has 3 divisors (see below), whose sum is σ = 166744729656057. Its totient is φ = 166744703830122.

The previous prime is 166744716743063. The next prime is 166744716743107. The reversal of 166744716743089 is 980347617447661.

The square root of 166744716743089 is 12912967.

It is a perfect power (a square), and thus also a powerful number.

166744716743089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 166744716743089 - 2²⁹ = 166744179872177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166744716743039) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6456484 + ... + 19369450.

It is an arithmetic number, because the mean of its divisors is an integer number (55581576552019).

Almost surely, 2^{166744716743089} is an apocalyptic number.

166744716743089 is the 12912967-th square number.

166744716743089 is the 6456484-th centered octagonal number.

It is an amenable number.

166744716743089 is a deficient number, since it is larger than the sum of its proper divisors (12912968).

166744716743089 is an frugal number, since it uses more digits than its factorization.

166744716743089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25825934 (or 12912967 counting only the distinct ones).

The product of its (nonzero) digits is 1024192512, while the sum is 73.

The spelling of 166744716743089 in words is "one hundred sixty-six trillion, seven hundred forty-four billion, seven hundred sixteen million, seven hundred forty-three thousand, eighty-nine".