664822585284 has 96 divisors (see below), whose sum is σ = 1826997379200. Its totient is φ = 185500416000.

The previous prime is 664822585279. The next prime is 664822585291. The reversal of 664822585284 is 482585228466.

It is an unprimeable number.

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, 205042 + ... + 1171190.

It is an arithmetic number, because the mean of its divisors is an integer number (19031222700).

Almost surely, 2^664822585284 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 664822585284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913498689600).

664822585284 is an abundant number, since it is smaller than the sum of its proper divisors (1162174793916).

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

664822585284 is a wasteful number, since it uses less digits than its factorization.

664822585284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966581 (or 966579 counting only the distinct ones).

The product of its digits is 58982400, while the sum is 60.

The spelling of 664822585284 in words is "six hundred sixty-four billion, eight hundred twenty-two million, five hundred eighty-five thousand, two hundred eighty-four".