16500066 has 48 divisors (see below), whose sum is σ = 37104480. Its totient is φ = 4850560.

The previous prime is 16500061. The next prime is 16500079. The reversal of 16500066 is 66000561.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16500061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185350 + ... + 185438.

It is an arithmetic number, because the mean of its divisors is an integer number (773010).

Almost surely, 2^16500066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16500066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18552240).

16500066 is an abundant number, since it is smaller than the sum of its proper divisors (20604414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16500066 is a wasteful number, since it uses less digits than its factorization.

16500066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 16500066 is about 4062.0273263483. The cubic root of 16500066 is about 254.5825079254.

It can be divided in two parts, 165000 and 66, that multiplied together give a square (10890000 = 3300²).

The spelling of 16500066 in words is "sixteen million, five hundred thousand, sixty-six".