166004443 has 8 divisors (see below), whose sum is σ = 181200240. Its totient is φ = 150826080.

The previous prime is 166004441. The next prime is 166004471. The reversal of 166004443 is 344400661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166004443 - 2¹ = 166004441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166004441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23121 + ... + 29437.

It is an arithmetic number, because the mean of its divisors is an integer number (22650030).

Almost surely, 2^166004443 is an apocalyptic number.

166004443 is a deficient number, since it is larger than the sum of its proper divisors (15195797).

166004443 is a wasteful number, since it uses less digits than its factorization.

166004443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8717.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 166004443 is about 12884.2711474107. The cubic root of 166004443 is about 549.5913692040.

The spelling of 166004443 in words is "one hundred sixty-six million, four thousand, four hundred forty-three".