16669643327 has 4 divisors (see below), whose sum is σ = 16670482080. Its totient is φ = 16668804576.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643327 is 72334696661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16669643303) and next prime (16669643351).

It is a cyclic number.

It is not a de Polignac number, because 16669643327 - 2¹⁰ = 16669642303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16669649327) by changing a digit.

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, 388823 + ... + 429560.

It is an arithmetic number, because the mean of its divisors is an integer number (4167620520).

Almost surely, 2^16669643327 is an apocalyptic number.

16669643327 is a deficient number, since it is larger than the sum of its proper divisors (838753).

16669643327 is an equidigital number, since it uses as much as digits as its factorization.

16669643327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838752.

The product of its digits is 5878656, while the sum is 53.

The spelling of 16669643327 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred twenty-seven".