664303384032 has 48 divisors (see below), whose sum is σ = 1744435590912. Its totient is φ = 221353292160.

The previous prime is 664303383971. The next prime is 664303384037. The reversal of 664303384032 is 230483303466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664303384037) 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, 1004728 + ... + 1529079.

It is an arithmetic number, because the mean of its divisors is an integer number (36342408144).

Almost surely, 2^664303384032 is an apocalyptic number.

It is an amenable number.

664303384032 is an abundant number, since it is smaller than the sum of its proper divisors (1080132206880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664303384032 is a wasteful number, since it uses less digits than its factorization.

664303384032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536551 (or 2536543 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

Adding to 664303384032 its reverse (230483303466), we get a palindrome (894786687498).

The spelling of 664303384032 in words is "six hundred sixty-four billion, three hundred three million, three hundred eighty-four thousand, thirty-two".