664583778488 has 32 divisors (see below), whose sum is σ = 1436710836960. Its totient is φ = 282301071360.

The previous prime is 664583778479. The next prime is 664583778499. The reversal of 664583778488 is 884877385466.

664583778488 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-3 number, since 3×664583778488³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52505033 + ... + 52517688.

It is an arithmetic number, because the mean of its divisors is an integer number (44897213655).

Almost surely, 2^664583778488 is an apocalyptic number.

It is an amenable number.

664583778488 is an abundant number, since it is smaller than the sum of its proper divisors (772127058472).

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

664583778488 is a wasteful number, since it uses less digits than its factorization.

664583778488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105022847 (or 105022843 counting only the distinct ones).

The product of its digits is 1734082560, while the sum is 74.

The spelling of 664583778488 in words is "six hundred sixty-four billion, five hundred eighty-three million, seven hundred seventy-eight thousand, four hundred eighty-eight".