664125533 has 2 divisors, whose sum is σ = 664125534. Its totient is φ = 664125532.

The previous prime is 664125479. The next prime is 664125547. The reversal of 664125533 is 335521466.

664125533 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., 663680644 + 444889 = 25762^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 664125533 - 2¹⁰ = 664124509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664125493 and 664125502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664125593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332062766 + 332062767.

It is an arithmetic number, because the mean of its divisors is an integer number (332062767).

Almost surely, 2^664125533 is an apocalyptic number.

It is an amenable number.

664125533 is a deficient number, since it is larger than the sum of its proper divisors (1).

664125533 is an equidigital number, since it uses as much as digits as its factorization.

664125533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 35.

The square root of 664125533 is about 25770.6331509336. The cubic root of 664125533 is about 872.4691091216.

Adding to 664125533 its reverse (335521466), we get a palindrome (999646999).

The spelling of 664125533 in words is "six hundred sixty-four million, one hundred twenty-five thousand, five hundred thirty-three".