166788213 has 16 divisors (see below), whose sum is σ = 237931200. Its totient is φ = 103610880.

The previous prime is 166788151. The next prime is 166788217. The reversal of 166788213 is 312887661.

It is not a de Polignac number, because 166788213 - 2¹⁰ = 166787189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166788217) 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 15 ways as a sum of consecutive naturals, for example, 20508 + ... + 27461.

It is an arithmetic number, because the mean of its divisors is an integer number (14870700).

Almost surely, 2^166788213 is an apocalyptic number.

It is an amenable number.

166788213 is a deficient number, since it is larger than the sum of its proper divisors (71142987).

166788213 is a wasteful number, since it uses less digits than its factorization.

166788213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48052.

The product of its digits is 96768, while the sum is 42.

The square root of 166788213 is about 12914.6510986554. The cubic root of 166788213 is about 550.4549546916.

The spelling of 166788213 in words is "one hundred sixty-six million, seven hundred eighty-eight thousand, two hundred thirteen".