665512882048 has 384 divisors, whose sum is σ = 1657687680000. Its totient is φ = 264579194880.

The previous prime is 665512881997. The next prime is 665512882103. The reversal of 665512882048 is 840288215566.

665512882048 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 665512882048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1389379473 + ... + 1389379951.

It is an arithmetic number, because the mean of its divisors is an integer number (4316895000).

Almost surely, 2^665512882048 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 665512882048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828843840000).

665512882048 is an abundant number, since it is smaller than the sum of its proper divisors (992174797952).

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

665512882048 is a wasteful number, since it uses less digits than its factorization.

665512882048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 55.

The spelling of 665512882048 in words is "six hundred sixty-five billion, five hundred twelve million, eight hundred eighty-two thousand, forty-eight".