166799279 has 8 divisors (see below), whose sum is σ = 170854992. Its totient is φ = 162751680.

The previous prime is 166799273. The next prime is 166799299. The reversal of 166799279 is 972997661.

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 166799279 - 2⁴ = 166799263 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 (166799273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68507 + ... + 70899.

It is an arithmetic number, because the mean of its divisors is an integer number (21356874).

Almost surely, 2^166799279 is an apocalyptic number.

166799279 is a deficient number, since it is larger than the sum of its proper divisors (4055713).

166799279 is a wasteful number, since it uses less digits than its factorization.

166799279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057.

The product of its digits is 2571912, while the sum is 56.

The square root of 166799279 is about 12915.0795196932. The cubic root of 166799279 is about 550.4671282133.

The spelling of 166799279 in words is "one hundred sixty-six million, seven hundred ninety-nine thousand, two hundred seventy-nine".