166839808 has 40 divisors (see below), whose sum is σ = 342402192. Its totient is φ = 81156096.

The previous prime is 166839781. The next prime is 166839811. The reversal of 166839808 is 808938661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14541 + ... + 23347.

Almost surely, 2^166839808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166839808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171201096).

166839808 is an abundant number, since it is smaller than the sum of its proper divisors (175562384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166839808 is an frugal number, since it uses more digits than its factorization.

166839808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862 (or 8846 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 166839808 is about 12916.6484817076. The cubic root of 166839808 is about 550.5117088927.

The spelling of 166839808 in words is "one hundred sixty-six million, eight hundred thirty-nine thousand, eight hundred eight".