13455666689 has 2 divisors, whose sum is σ = 13455666690. Its totient is φ = 13455666688.

The previous prime is 13455666671. The next prime is 13455666773. The reversal of 13455666689 is 98666655431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8846343025 + 4609323664 = 94055^2 + 67892^2 .

It is a cyclic number.

It is not a de Polignac number, because 13455666689 - 2¹² = 13455662593 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (13455666619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6727833344 + 6727833345.

It is an arithmetic number, because the mean of its divisors is an integer number (6727833345).

Almost surely, 2^13455666689 is an apocalyptic number.

It is an amenable number.

13455666689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13455666689 is an equidigital number, since it uses as much as digits as its factorization.

13455666689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 59.

The spelling of 13455666689 in words is "thirteen billion, four hundred fifty-five million, six hundred sixty-six thousand, six hundred eighty-nine".