16664473 has 16 divisors (see below), whose sum is σ = 19918080. Its totient is φ = 13640256.

The previous prime is 16664447. The next prime is 16664477. The reversal of 16664473 is 37446661.

It is a de Polignac number, because none of the positive numbers 2^k-16664473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16664477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20511 + ... + 21307.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^16664473 is an apocalyptic number.

It is an amenable number.

16664473 is a deficient number, since it is larger than the sum of its proper divisors (3253607).

16664473 is a wasteful number, since it uses less digits than its factorization.

16664473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its digits is 72576, while the sum is 37.

The square root of 16664473 is about 4082.2142275976. The cubic root of 16664473 is about 255.4252701231.

The spelling of 16664473 in words is "sixteen million, six hundred sixty-four thousand, four hundred seventy-three".