166664847 has 8 divisors (see below), whose sum is σ = 224420400. Its totient is φ = 110009600.

The previous prime is 166664843. The next prime is 166664863. The reversal of 166664847 is 748466661.

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 166664847 - 2² = 166664843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166664796 and 166664805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166664843) 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, 274722 + ... + 275327.

It is an arithmetic number, because the mean of its divisors is an integer number (28052550).

Almost surely, 2^166664847 is an apocalyptic number.

166664847 is a deficient number, since it is larger than the sum of its proper divisors (57755553).

166664847 is a wasteful number, since it uses less digits than its factorization.

166664847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550153.

The product of its digits is 1161216, while the sum is 48.

The square root of 166664847 is about 12909.8740117787. The cubic root of 166664847 is about 550.3192053395.

The spelling of 166664847 in words is "one hundred sixty-six million, six hundred sixty-four thousand, eight hundred forty-seven".