329666385 has 16 divisors (see below), whose sum is σ = 530121600. Its totient is φ = 174936960.

The previous prime is 329666377. The next prime is 329666399. The reversal of 329666385 is 583666923.

It is not a de Polignac number, because 329666385 - 2³ = 329666377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52236 + ... + 58205.

It is an arithmetic number, because the mean of its divisors is an integer number (33132600).

Almost surely, 2^329666385 is an apocalyptic number.

It is an amenable number.

329666385 is a deficient number, since it is larger than the sum of its proper divisors (200455215).

329666385 is a wasteful number, since it uses less digits than its factorization.

329666385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110648.

The product of its digits is 1399680, while the sum is 48.

The square root of 329666385 is about 18156.7173519885. The cubic root of 329666385 is about 690.8093736906.

The spelling of 329666385 in words is "three hundred twenty-nine million, six hundred sixty-six thousand, three hundred eighty-five".