2066111388 has 216 divisors, whose sum is σ = 6279187824. Its totient is φ = 587865600.

The previous prime is 2066111387. The next prime is 2066111393. The reversal of 2066111388 is 8831116602.

2066111388 is a `hidden beast` number, since 2 + 0 + 6 + 611 + 1 + 38 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066111381) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4907418 + ... + 4907838.

It is an arithmetic number, because the mean of its divisors is an integer number (29070314).

Almost surely, 2^2066111388 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 2066111388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3139593912).

2066111388 is an abundant number, since it is smaller than the sum of its proper divisors (4213076436).

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

2066111388 is a wasteful number, since it uses less digits than its factorization.

2066111388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2066111388 is about 45454.4979952480. The cubic root of 2066111388 is about 1273.6533546547.

The spelling of 2066111388 in words is "two billion, sixty-six million, one hundred eleven thousand, three hundred eighty-eight".