166644003 has 16 divisors (see below), whose sum is σ = 241433600. Its totient is φ = 101852640.

The previous prime is 166644001. The next prime is 166644011. The reversal of 166644003 is 300446661.

It is not a de Polignac number, because 166644003 - 2¹ = 166644001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166644001) 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, 45388 + ... + 48921.

It is an arithmetic number, because the mean of its divisors is an integer number (15089600).

Almost surely, 2^166644003 is an apocalyptic number.

166644003 is a deficient number, since it is larger than the sum of its proper divisors (74789597).

166644003 is a wasteful number, since it uses less digits than its factorization.

166644003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94362.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 166644003 is about 12909.0666974805. The cubic root of 166644003 is about 550.2962624255.

The spelling of 166644003 in words is "one hundred sixty-six million, six hundred forty-four thousand, three".