16664203 has 2 divisors, whose sum is σ = 16664204. Its totient is φ = 16664202.

The previous prime is 16664191. The next prime is 16664231. The reversal of 16664203 is 30246661.

It is an a-pointer prime, because the next prime (16664231) can be obtained adding 16664203 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16664203 - 2²¹ = 14567051 is a prime.

It is not a weakly prime, because it can be changed into another prime (16664003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332101 + 8332102.

It is an arithmetic number, because the mean of its divisors is an integer number (8332102).

Almost surely, 2^16664203 is an apocalyptic number.

16664203 is a deficient number, since it is larger than the sum of its proper divisors (1).

16664203 is an equidigital number, since it uses as much as digits as its factorization.

16664203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 16664203 is about 4082.1811571757. The cubic root of 16664203 is about 255.4238906376.

The spelling of 16664203 in words is "sixteen million, six hundred sixty-four thousand, two hundred three".