665017052052 has 24 divisors (see below), whose sum is σ = 1566208387296. Its totient is φ = 219600646048.

The previous prime is 665017051973. The next prime is 665017052069. The reversal of 665017052052 is 250250710566.

665017052052 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×665017052052³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665017052052.

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, 258961743 + ... + 258964310.

It is an arithmetic number, because the mean of its divisors is an integer number (65258682804).

Almost surely, 2^665017052052 is an apocalyptic number.

It is an amenable number.

665017052052 is an abundant number, since it is smaller than the sum of its proper divisors (901191335244).

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

665017052052 is a wasteful number, since it uses less digits than its factorization.

665017052052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517926167 (or 517926165 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 665017052052 in words is "six hundred sixty-five billion, seventeen million, fifty-two thousand, fifty-two".