2066209728 has 112 divisors (see below), whose sum is σ = 5979542016. Its totient is φ = 624476160.

The previous prime is 2066209703. The next prime is 2066209771. The reversal of 2066209728 is 8279026602.

It is a self number, because there is not a number n which added to its sum of digits gives 2066209728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 976800 + ... + 978912.

It is an arithmetic number, because the mean of its divisors is an integer number (53388768).

Almost surely, 2^2066209728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2066209728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2989771008).

2066209728 is an abundant number, since it is smaller than the sum of its proper divisors (3913332288).

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

2066209728 is a wasteful number, since it uses less digits than its factorization.

2066209728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 2066209728 is about 45455.5797235059. The cubic root of 2066209728 is about 1273.6735615491.

The spelling of 2066209728 in words is "two billion, sixty-six million, two hundred nine thousand, seven hundred twenty-eight".