665559251352 has 96 divisors (see below), whose sum is σ = 1847447784000. Its totient is φ = 216333411840.

The previous prime is 665559251347. The next prime is 665559251353. The reversal of 665559251352 is 253152955566.

665559251352 is a `hidden beast` number, since 6 + 6 + 5 + 559 + 2 + 51 + 35 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665559251353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5934049 + ... + 6045167.

It is an arithmetic number, because the mean of its divisors is an integer number (19244247750).

Almost surely, 2^665559251352 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 665559251352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923723892000).

665559251352 is an abundant number, since it is smaller than the sum of its proper divisors (1181888532648).

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

665559251352 is a wasteful number, since it uses less digits than its factorization.

665559251352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113201 (or 113194 counting only the distinct ones).

The product of its digits is 12150000, while the sum is 54.

The spelling of 665559251352 in words is "six hundred sixty-five billion, five hundred fifty-nine million, two hundred fifty-one thousand, three hundred fifty-two".