166705404 has 12 divisors (see below), whose sum is σ = 388979304. Its totient is φ = 55568464.

The previous prime is 166705391. The next prime is 166705423. The reversal of 166705404 is 404507661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6946047 + ... + 6946070.

It is an arithmetic number, because the mean of its divisors is an integer number (32414942).

Almost surely, 2^166705404 is an apocalyptic number.

It is an amenable number.

166705404 is an abundant number, since it is smaller than the sum of its proper divisors (222273900).

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

166705404 is a wasteful number, since it uses less digits than its factorization.

166705404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13892124 (or 13892122 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 166705404 is about 12911.4446906611. Note that the first 3 decimals coincide. The cubic root of 166705404 is about 550.3638407985.

The spelling of 166705404 in words is "one hundred sixty-six million, seven hundred five thousand, four hundred four".