664838510084 has 96 divisors (see below), whose sum is σ = 1417456744704. Its totient is φ = 266353274880.

The previous prime is 664838510041. The next prime is 664838510087. The reversal of 664838510084 is 480015838466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (664838510087) 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 31 ways as a sum of consecutive naturals, for example, 57851579 + ... + 57863069.

It is an arithmetic number, because the mean of its divisors is an integer number (14765174424).

Almost surely, 2^664838510084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664838510084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708728372352).

664838510084 is an abundant number, since it is smaller than the sum of its proper divisors (752618234620).

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

664838510084 is a wasteful number, since it uses less digits than its factorization.

664838510084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12333 (or 12331 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 664838510084 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, five hundred ten thousand, eighty-four".