16644073 has 16 divisors (see below), whose sum is σ = 17752896. Its totient is φ = 15586560.

The previous prime is 16644059. The next prime is 16644083. The reversal of 16644073 is 37044661.

It is not a de Polignac number, because 16644073 - 2¹³ = 16635881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16644013) 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 15 ways as a sum of consecutive naturals, for example, 200490 + ... + 200572.

It is an arithmetic number, because the mean of its divisors is an integer number (1109556).

Almost surely, 2^16644073 is an apocalyptic number.

It is an amenable number.

16644073 is a deficient number, since it is larger than the sum of its proper divisors (1108823).

16644073 is an equidigital number, since it uses as much as digits as its factorization.

16644073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 16644073 is about 4079.7148184646. The cubic root of 16644073 is about 255.3210003352.

The spelling of 16644073 in words is "sixteen million, six hundred forty-four thousand, seventy-three".