664055560608 has 768 divisors, whose sum is σ = 2126662594560. Its totient is φ = 179313868800.

The previous prime is 664055560523. The next prime is 664055560657. The reversal of 664055560608 is 806065550466.

664055560608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664055560608² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2468607898 + ... + 2468608166.

It is an arithmetic number, because the mean of its divisors is an integer number (2769091920).

Almost surely, 2^664055560608 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 664055560608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063331297280).

664055560608 is an abundant number, since it is smaller than the sum of its proper divisors (1462607033952).

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

664055560608 is a wasteful number, since it uses less digits than its factorization.

664055560608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 664055560608 in words is "six hundred sixty-four billion, fifty-five million, five hundred sixty thousand, six hundred eight".