664330450360169 has 2 divisors, whose sum is σ = 664330450360170. Its totient is φ = 664330450360168.

The previous prime is 664330450360081. The next prime is 664330450360229. The reversal of 664330450360169 is 961063054033466.

It is a happy number.

664330450360169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658835340812944 + 5495109547225 = 25667788^2 + 2344165^2 .

It is a cyclic number.

It is not a de Polignac number, because 664330450360169 - 2¹² = 664330450356073 is a prime.

It is a super-2 number, since 2×664330450360169² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664330450060169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332165225180084 + 332165225180085.

It is an arithmetic number, because the mean of its divisors is an integer number (332165225180085).

Almost surely, 2^{664330450360169} is an apocalyptic number.

It is an amenable number.

664330450360169 is a deficient number, since it is larger than the sum of its proper divisors (1).

664330450360169 is an equidigital number, since it uses as much as digits as its factorization.

664330450360169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 56.

The spelling of 664330450360169 in words is "six hundred sixty-four trillion, three hundred thirty billion, four hundred fifty million, three hundred sixty thousand, one hundred sixty-nine".