166388673 has 48 divisors (see below), whose sum is σ = 263148480. Its totient is φ = 93096960.

The previous prime is 166388657. The next prime is 166388683. The reversal of 166388673 is 376883661.

It is not a de Polignac number, because 166388673 - 2⁴ = 166388657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166388623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 363861 + ... + 364317.

It is an arithmetic number, because the mean of its divisors is an integer number (5482260).

Almost surely, 2^166388673 is an apocalyptic number.

It is an amenable number.

166388673 is a deficient number, since it is larger than the sum of its proper divisors (96759807).

166388673 is a wasteful number, since it uses less digits than its factorization.

166388673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 547 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 166388673 is about 12899.1733456063. The cubic root of 166388673 is about 550.0150662540.

The spelling of 166388673 in words is "one hundred sixty-six million, three hundred eighty-eight thousand, six hundred seventy-three".