664581416333 has 2 divisors, whose sum is σ = 664581416334. Its totient is φ = 664581416332.

The previous prime is 664581416309. The next prime is 664581416351. The reversal of 664581416333 is 333614185466.

664581416333 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., 593605529764 + 70975886569 = 770458^2 + 266413^2 .

It is a cyclic number.

It is not a de Polignac number, because 664581416333 - 2⁸ = 664581416077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664581416363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332290708166 + 332290708167.

It is an arithmetic number, because the mean of its divisors is an integer number (332290708167).

Almost surely, 2^664581416333 is an apocalyptic number.

It is an amenable number.

664581416333 is a deficient number, since it is larger than the sum of its proper divisors (1).

664581416333 is an equidigital number, since it uses as much as digits as its factorization.

664581416333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 50.

The spelling of 664581416333 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred thirty-three".