2066320656 has 120 divisors (see below), whose sum is σ = 5938414560. Its totient is φ = 670476288.

The previous prime is 2066320639. The next prime is 2066320691. The reversal of 2066320656 is 6560236602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2066320656.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 907936 + ... + 910208.

It is an arithmetic number, because the mean of its divisors is an integer number (49486788).

Almost surely, 2^2066320656 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 2066320656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2969207280).

2066320656 is an abundant number, since it is smaller than the sum of its proper divisors (3872093904).

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

2066320656 is a wasteful number, since it uses less digits than its factorization.

2066320656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 2066320656 is about 45456.7998873656. The cubic root of 2066320656 is about 1273.6963542551.

The spelling of 2066320656 in words is "two billion, sixty-six million, three hundred twenty thousand, six hundred fifty-six".