166486279 has 4 divisors (see below), whose sum is σ = 168134760. Its totient is φ = 164837800.

The previous prime is 166486261. The next prime is 166486283. The reversal of 166486279 is 972684661.

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 166486279 - 2¹³ = 166478087 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 (166486979) 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, 824089 + ... + 824290.

It is an arithmetic number, because the mean of its divisors is an integer number (42033690).

Almost surely, 2^166486279 is an apocalyptic number.

166486279 is a deficient number, since it is larger than the sum of its proper divisors (1648481).

166486279 is a wasteful number, since it uses less digits than its factorization.

166486279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648480.

The product of its digits is 870912, while the sum is 49.

The square root of 166486279 is about 12902.9562116594. The cubic root of 166486279 is about 550.1225941595.

The spelling of 166486279 in words is "one hundred sixty-six million, four hundred eighty-six thousand, two hundred seventy-nine".