2166221660153 has 2 divisors, whose sum is σ = 2166221660154. Its totient is φ = 2166221660152.

The previous prime is 2166221660101. The next prime is 2166221660167. The reversal of 2166221660153 is 3510661226612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2110941656464 + 55280003689 = 1452908^2 + 235117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166221660153 - 2²⁸ = 2165953224697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2166221660153.

It is not a weakly prime, because it can be changed into another prime (2166221663153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083110830076 + 1083110830077.

It is an arithmetic number, because the mean of its divisors is an integer number (1083110830077).

Almost surely, 2^{2166221660153} is an apocalyptic number.

It is an amenable number.

2166221660153 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166221660153 is an equidigital number, since it uses as much as digits as its factorization.

2166221660153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

Adding to 2166221660153 its reverse (3510661226612), we get a palindrome (5676882886765).

The spelling of 2166221660153 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred sixty thousand, one hundred fifty-three".