166639343 has 8 divisors (see below), whose sum is σ = 181986336. Its totient is φ = 151653600.

The previous prime is 166639337. The next prime is 166639351. The reversal of 166639343 is 343936661.

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 166639343 - 2¹⁰ = 166638319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166639343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166639243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89348 + ... + 91193.

It is an arithmetic number, because the mean of its divisors is an integer number (22748292).

Almost surely, 2^166639343 is an apocalyptic number.

166639343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166639343 is a deficient number, since it is larger than the sum of its proper divisors (15346993).

166639343 is a wasteful number, since it uses less digits than its factorization.

166639343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180625.

The product of its digits is 209952, while the sum is 41.

The square root of 166639343 is about 12908.8862029224. The cubic root of 166639343 is about 550.2911329190.

The spelling of 166639343 in words is "one hundred sixty-six million, six hundred thirty-nine thousand, three hundred forty-three".