2066221522065 has 64 divisors (see below), whose sum is σ = 3373680844800. Its totient is φ = 1079601540864.

The previous prime is 2066221522063. The next prime is 2066221522067. The reversal of 2066221522065 is 5602251226602.

It is an interprime number because it is at equal distance from previous prime (2066221522063) and next prime (2066221522067).

It is not a de Polignac number, because 2066221522065 - 2¹ = 2066221522063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2066221522063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 201518479 + ... + 201528731.

It is an arithmetic number, because the mean of its divisors is an integer number (52713763200).

Almost surely, 2^{2066221522065} is an apocalyptic number.

It is an amenable number.

2066221522065 is a deficient number, since it is larger than the sum of its proper divisors (1307459322735).

2066221522065 is a wasteful number, since it uses less digits than its factorization.

2066221522065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 2066221522065 its reverse (5602251226602), we get a palindrome (7668472748667).

The spelling of 2066221522065 in words is "two trillion, sixty-six billion, two hundred twenty-one million, five hundred twenty-two thousand, sixty-five".