166393384 has 8 divisors (see below), whose sum is σ = 311987610. Its totient is φ = 83196688.

The previous prime is 166393379. The next prime is 166393417. The reversal of 166393384 is 483393661.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 10692900 = 12478^2 + 3270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 166393384.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399579 + ... + 10399594.

Almost surely, 2^166393384 is an apocalyptic number.

It is an amenable number.

166393384 is a deficient number, since it is larger than the sum of its proper divisors (145594226).

166393384 is a wasteful number, since it uses less digits than its factorization.

166393384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20799179 (or 20799175 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The square root of 166393384 is about 12899.3559529149. The cubic root of 166393384 is about 550.0202571051.

The spelling of 166393384 in words is "one hundred sixty-six million, three hundred ninety-three thousand, three hundred eighty-four".