166864707406 has 8 divisors (see below), whose sum is σ = 250351240104. Its totient is φ = 83414294040.

The previous prime is 166864707389. The next prime is 166864707421. The reversal of 166864707406 is 604707468661.

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

It is a super-3 number, since 3×166864707406³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9018280 + ... + 9036763.

It is an arithmetic number, because the mean of its divisors is an integer number (31293905013).

Almost surely, 2^166864707406 is an apocalyptic number.

166864707406 is a deficient number, since it is larger than the sum of its proper divisors (83486532698).

166864707406 is a wasteful number, since it uses less digits than its factorization.

166864707406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18059666.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 166864707406 in words is "one hundred sixty-six billion, eight hundred sixty-four million, seven hundred seven thousand, four hundred six".