664823452529 has 8 divisors (see below), whose sum is σ = 674435860992. Its totient is φ = 655217952480.

The previous prime is 664823452459. The next prime is 664823452561. The reversal of 664823452529 is 925254328466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 664823452529 - 2¹⁶ = 664823386993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664823472529) 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, 1533089 + ... + 1918334.

It is an arithmetic number, because the mean of its divisors is an integer number (84304482624).

Almost surely, 2^664823452529 is an apocalyptic number.

It is an amenable number.

664823452529 is a deficient number, since it is larger than the sum of its proper divisors (9612408463).

664823452529 is a wasteful number, since it uses less digits than its factorization.

664823452529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454207.

The product of its digits is 24883200, while the sum is 56.

The spelling of 664823452529 in words is "six hundred sixty-four billion, eight hundred twenty-three million, four hundred fifty-two thousand, five hundred twenty-nine".