5456664666529 has 2 divisors, whose sum is σ = 5456664666530. Its totient is φ = 5456664666528.

The previous prime is 5456664666451. The next prime is 5456664666581. The reversal of 5456664666529 is 9256664666545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5126669566225 + 329995100304 = 2264215^2 + 574452^2 .

It is a cyclic number.

It is not a de Polignac number, because 5456664666529 - 2¹³ = 5456664658337 is a prime.

It is not a weakly prime, because it can be changed into another prime (5456664666029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728332333264 + 2728332333265.

It is an arithmetic number, because the mean of its divisors is an integer number (2728332333265).

Almost surely, 2^{5456664666529} is an apocalyptic number.

It is an amenable number.

5456664666529 is a deficient number, since it is larger than the sum of its proper divisors (1).

5456664666529 is an equidigital number, since it uses as much as digits as its factorization.

5456664666529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616000, while the sum is 70.

The spelling of 5456664666529 in words is "five trillion, four hundred fifty-six billion, six hundred sixty-four million, six hundred sixty-six thousand, five hundred twenty-nine".