2066390885 has 96 divisors (see below), whose sum is σ = 3064210560. Its totient is φ = 1328431104.

The previous prime is 2066390881. The next prime is 2066390891. The reversal of 2066390885 is 5880936602.

It is a happy number.

It is not a de Polignac number, because 2066390885 - 2² = 2066390881 is a prime.

It is a super-2 number, since 2×2066390885² = 8539942579222166450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066390881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18286589 + ... + 18286701.

It is an arithmetic number, because the mean of its divisors is an integer number (31918860).

Almost surely, 2^2066390885 is an apocalyptic number.

It is an amenable number.

2066390885 is a deficient number, since it is larger than the sum of its proper divisors (997819675).

2066390885 is a wasteful number, since it uses less digits than its factorization.

2066390885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 2066390885 is about 45457.5723614889. The cubic root of 2066390885 is about 1273.7107839948.

The spelling of 2066390885 in words is "two billion, sixty-six million, three hundred ninety thousand, eight hundred eighty-five".