2066656416 has 96 divisors (see below), whose sum is σ = 6109157376. Its totient is φ = 606048000.

The previous prime is 2066656399. The next prime is 2066656453. The reversal of 2066656416 is 6146566602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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, 1171 + ... + 64301.

It is an arithmetic number, because the mean of its divisors is an integer number (63637056).

Almost surely, 2^2066656416 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 2066656416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3054578688).

2066656416 is an abundant number, since it is smaller than the sum of its proper divisors (4042500960).

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

2066656416 is a wasteful number, since it uses less digits than its factorization.

2066656416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63186 (or 63178 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 2066656416 is about 45460.4929141777. The cubic root of 2066656416 is about 1273.7653388897.

The spelling of 2066656416 in words is "two billion, sixty-six million, six hundred fifty-six thousand, four hundred sixteen".