2220664163265 has 24 divisors (see below), whose sum is σ = 3855389759208. Its totient is φ = 1182434668800.

The previous prime is 2220664163227. The next prime is 2220664163279. The reversal of 2220664163265 is 5623614660222.

2220664163265 is a `hidden beast` number, since 2 + 2 + 2 + 0 + 6 + 6 + 4 + 1 + 632 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 37099382544 + 2183564780721 = 192612^2 + 1477689^2 .

It is not a de Polignac number, because 2220664163265 - 2¹² = 2220664159169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2220664163265.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39962586 + ... + 40018115.

It is an arithmetic number, because the mean of its divisors is an integer number (160641239967).

Almost surely, 2^{2220664163265} is an apocalyptic number.

It is an amenable number.

2220664163265 is a deficient number, since it is larger than the sum of its proper divisors (1634725595943).

2220664163265 is a wasteful number, since it uses less digits than its factorization.

2220664163265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79981329 (or 79981326 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 2220664163265 in words is "two trillion, two hundred twenty billion, six hundred sixty-four million, one hundred sixty-three thousand, two hundred sixty-five".