664231533 has 8 divisors (see below), whose sum is σ = 1012162368. Its totient is φ = 379560864.

The previous prime is 664231489. The next prime is 664231537. The reversal of 664231533 is 335132466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664231533 - 2¹² = 664227437 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 664231494 and 664231503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664231537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15815016 + ... + 15815057.

It is an arithmetic number, because the mean of its divisors is an integer number (126520296).

Almost surely, 2^664231533 is an apocalyptic number.

It is an amenable number.

664231533 is a deficient number, since it is larger than the sum of its proper divisors (347930835).

664231533 is a wasteful number, since it uses less digits than its factorization.

664231533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31630083.

The product of its digits is 38880, while the sum is 33.

The square root of 664231533 is about 25772.6896733732. The cubic root of 664231533 is about 872.5155244458.

Adding to 664231533 its reverse (335132466), we get a palindrome (999363999).

The spelling of 664231533 in words is "six hundred sixty-four million, two hundred thirty-one thousand, five hundred thirty-three".