16664329 has 8 divisors (see below), whose sum is σ = 18766080. Its totient is φ = 14660400.

The previous prime is 16664321. The next prime is 16664341. The reversal of 16664329 is 92346661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16664329 - 2³ = 16664321 is a prime.

It is a super-2 number, since 2×16664329² = 555399722040482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16664321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24094 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (2345760).

Almost surely, 2^16664329 is an apocalyptic number.

It is an amenable number.

16664329 is a deficient number, since it is larger than the sum of its proper divisors (2101751).

16664329 is a wasteful number, since it uses less digits than its factorization.

16664329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48911.

The product of its digits is 46656, while the sum is 37.

The square root of 16664329 is about 4082.1965900726. The cubic root of 16664329 is about 255.4245343993.

It can be divided in two parts, 1666 and 4329, that added together give a palindrome (5995).

The spelling of 16664329 in words is "sixteen million, six hundred sixty-four thousand, three hundred twenty-nine".