2065776666 has 32 divisors (see below), whose sum is σ = 4222844928. Its totient is φ = 673530480.

The previous prime is 2065776659. The next prime is 2065776683. The reversal of 2065776666 is 6666775602.

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, 35011 + ... + 73193.

It is an arithmetic number, because the mean of its divisors is an integer number (131963904).

Almost surely, 2^2065776666 is an apocalyptic number.

2065776666 is an abundant number, since it is smaller than the sum of its proper divisors (2157068262).

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

2065776666 is a wasteful number, since it uses less digits than its factorization.

2065776666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38386.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The square root of 2065776666 is about 45450.8159002674. The cubic root of 2065776666 is about 1273.5845712024.

The spelling of 2065776666 in words is "two billion, sixty-five million, seven hundred seventy-six thousand, six hundred sixty-six".