2066611668 has 48 divisors (see below), whose sum is σ = 5264118720. Its totient is φ = 625811200.

The previous prime is 2066611661. The next prime is 2066611693. The reversal of 2066611668 is 8661166602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066611661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221008 + ... + 230168.

It is an arithmetic number, because the mean of its divisors is an integer number (109669140).

Almost surely, 2^2066611668 is an apocalyptic number.

It is an amenable number.

2066611668 is an abundant number, since it is smaller than the sum of its proper divisors (3197507052).

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

2066611668 is a wasteful number, since it uses less digits than its factorization.

2066611668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888 (or 10886 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 2066611668 is about 45460.0007479102. Note that the first 3 decimals coincide. The cubic root of 2066611668 is about 1273.7561454792.

The spelling of 2066611668 in words is "two billion, sixty-six million, six hundred eleven thousand, six hundred sixty-eight".