166385159 has 4 divisors (see below), whose sum is σ = 166520904. Its totient is φ = 166249416.

The previous prime is 166385143. The next prime is 166385161. The reversal of 166385159 is 951583661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166385159 - 2⁴ = 166385143 is a prime.

It is a super-2 number, since 2×166385159² = 55368042270910562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166385129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66017 + ... + 68490.

It is an arithmetic number, because the mean of its divisors is an integer number (41630226).

Almost surely, 2^166385159 is an apocalyptic number.

166385159 is a deficient number, since it is larger than the sum of its proper divisors (135745).

166385159 is a wasteful number, since it uses less digits than its factorization.

166385159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135744.

The product of its digits is 194400, while the sum is 44.

The square root of 166385159 is about 12899.0371346081. The cubic root of 166385159 is about 550.0111942625.

The spelling of 166385159 in words is "one hundred sixty-six million, three hundred eighty-five thousand, one hundred fifty-nine".