329666309 has 8 divisors (see below), whose sum is σ = 377850048. Its totient is φ = 281754720.

The previous prime is 329666273. The next prime is 329666327. The reversal of 329666309 is 903666923.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-329666309 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 329666309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329666399) 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, 65432 + ... + 70289.

It is an arithmetic number, because the mean of its divisors is an integer number (47231256).

Almost surely, 2^329666309 is an apocalyptic number.

It is an amenable number.

329666309 is a deficient number, since it is larger than the sum of its proper divisors (48183739).

329666309 is a wasteful number, since it uses less digits than its factorization.

329666309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136075.

The product of its (nonzero) digits is 314928, while the sum is 44.

The square root of 329666309 is about 18156.7152590990. The cubic root of 329666309 is about 690.8093206051.

The spelling of 329666309 in words is "three hundred twenty-nine million, six hundred sixty-six thousand, three hundred nine".