166881151 has 8 divisors (see below), whose sum is σ = 171437904. Its totient is φ = 162355200.

The previous prime is 166881133. The next prime is 166881179. The reversal of 166881151 is 151188661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166881151 - 2⁵ = 166881119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166881151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166881191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3501 + ... + 18601.

It is an arithmetic number, because the mean of its divisors is an integer number (21429738).

Almost surely, 2^166881151 is an apocalyptic number.

166881151 is a deficient number, since it is larger than the sum of its proper divisors (4556753).

166881151 is a wasteful number, since it uses less digits than its factorization.

166881151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401.

The product of its digits is 11520, while the sum is 37.

The square root of 166881151 is about 12918.2487590230. The cubic root of 166881151 is about 550.5571775095.

The spelling of 166881151 in words is "one hundred sixty-six million, eight hundred eighty-one thousand, one hundred fifty-one".