2219566665 has 16 divisors (see below), whose sum is σ = 3760207488. Its totient is φ = 1114135296.

The previous prime is 2219566663. The next prime is 2219566721. The reversal of 2219566665 is 5666659122.

It is not a de Polignac number, because 2219566665 - 2¹ = 2219566663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2219566663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4351837 + ... + 4352346.

It is an arithmetic number, because the mean of its divisors is an integer number (235012968).

Almost surely, 2^2219566665 is an apocalyptic number.

It is an amenable number.

2219566665 is a deficient number, since it is larger than the sum of its proper divisors (1540640823).

2219566665 is a wasteful number, since it uses less digits than its factorization.

2219566665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8704208.

The product of its digits is 1166400, while the sum is 48.

The square root of 2219566665 is about 47112.2772215481. The cubic root of 2219566665 is about 1304.4358654432.

The spelling of 2219566665 in words is "two billion, two hundred nineteen million, five hundred sixty-six thousand, six hundred sixty-five".