664820530704 has 240 divisors, whose sum is σ = 2038999120704. Its totient is φ = 200542003200.

The previous prime is 664820530679. The next prime is 664820530721. The reversal of 664820530704 is 407035028466.

664820530704 is a `hidden beast` number, since 6 + 6 + 48 + 2 + 0 + 530 + 70 + 4 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 664820530704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423182239 + ... + 423183809.

Almost surely, 2^664820530704 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 664820530704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019499560352).

664820530704 is an abundant number, since it is smaller than the sum of its proper divisors (1374178590000).

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

664820530704 is a wasteful number, since it uses less digits than its factorization.

664820530704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 664820530704 in words is "six hundred sixty-four billion, eight hundred twenty million, five hundred thirty thousand, seven hundred four".