664423357253 has 2 divisors, whose sum is σ = 664423357254. Its totient is φ = 664423357252.

The previous prime is 664423357229. The next prime is 664423357289. The reversal of 664423357253 is 352753324466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549226245604 + 115197111649 = 741098^2 + 339407^2 .

It is a cyclic number.

It is not a de Polignac number, because 664423357253 - 2¹⁶ = 664423291717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664423357223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332211678626 + 332211678627.

It is an arithmetic number, because the mean of its divisors is an integer number (332211678627).

Almost surely, 2^664423357253 is an apocalyptic number.

It is an amenable number.

664423357253 is a deficient number, since it is larger than the sum of its proper divisors (1).

664423357253 is an equidigital number, since it uses as much as digits as its factorization.

664423357253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 50.

The spelling of 664423357253 in words is "six hundred sixty-four billion, four hundred twenty-three million, three hundred fifty-seven thousand, two hundred fifty-three".