664562435320 has 384 divisors, whose sum is σ = 1943727451200. Its totient is φ = 202627547136.

The previous prime is 664562435311. The next prime is 664562435323. The reversal of 664562435320 is 23534265466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664562435323) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 289316412 + ... + 289318708.

Almost surely, 2^664562435320 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 664562435320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971863725600).

664562435320 is an abundant number, since it is smaller than the sum of its proper divisors (1279165015880).

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

664562435320 is a wasteful number, since it uses less digits than its factorization.

664562435320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 664562435320 in words is "six hundred sixty-four billion, five hundred sixty-two million, four hundred thirty-five thousand, three hundred twenty".