664306848921 has 8 divisors (see below), whose sum is σ = 914314802944. Its totient is φ = 428585063760.

The previous prime is 664306848901. The next prime is 664306848943. The reversal of 664306848921 is 129848603466.

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

It is not a de Polignac number, because 664306848921 - 2⁹ = 664306848409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (664306848901) 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, 3571542106 + ... + 3571542291.

It is an arithmetic number, because the mean of its divisors is an integer number (114289350368).

Almost surely, 2^664306848921 is an apocalyptic number.

It is an amenable number.

664306848921 is a deficient number, since it is larger than the sum of its proper divisors (250007954023).

664306848921 is a wasteful number, since it uses less digits than its factorization.

664306848921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143084431.

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 664306848921 in words is "six hundred sixty-four billion, three hundred six million, eight hundred forty-eight thousand, nine hundred twenty-one".