2265105666 has 32 divisors (see below), whose sum is σ = 4574401920. Its totient is φ = 747697536.

The previous prime is 2265105659. The next prime is 2265105671. The reversal of 2265105666 is 6665015622.

It is a happy number.

It is a Curzon number.

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, 357720 + ... + 363996.

It is an arithmetic number, because the mean of its divisors is an integer number (142950060).

Almost surely, 2^2265105666 is an apocalyptic number.

2265105666 is an abundant number, since it is smaller than the sum of its proper divisors (2309296254).

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

2265105666 is a wasteful number, since it uses less digits than its factorization.

2265105666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6858.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2265105666 is about 47593.1262473900. The cubic root of 2265105666 is about 1313.2966067329.

The spelling of 2265105666 in words is "two billion, two hundred sixty-five million, one hundred five thousand, six hundred sixty-six".