2064880666 has 4 divisors (see below), whose sum is σ = 3097321002. Its totient is φ = 1032440332.

The previous prime is 2064880633. The next prime is 2064880669. The reversal of 2064880666 is 6660884602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6660884602 = 2 ⋅3330442301.

It can be written as a sum of positive squares in only one way, i.e., 1920280041 + 144600625 = 43821^2 + 12025^2 .

It is not an unprimeable number, because it can be changed into a prime (2064880669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516220165 + ... + 516220168.

Almost surely, 2^2064880666 is an apocalyptic number.

2064880666 is a deficient number, since it is larger than the sum of its proper divisors (1032440336).

2064880666 is a wasteful number, since it uses less digits than its factorization.

2064880666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032440335.

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 2064880666 is about 45440.9580224713. The cubic root of 2064880666 is about 1273.4004117662.

The spelling of 2064880666 in words is "two billion, sixty-four million, eight hundred eighty thousand, six hundred sixty-six".