666165210152 has 32 divisors (see below), whose sum is σ = 1363567898280. Its totient is φ = 303249070080.

The previous prime is 666165210077. The next prime is 666165210167. The reversal of 666165210152 is 251012561666.

It can be written as a sum of positive squares in 4 ways, for example, as 247134259876 + 419030950276 = 497126^2 + 647326^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43865249 + ... + 43880432.

Almost surely, 2^666165210152 is an apocalyptic number.

It is an amenable number.

666165210152 is an abundant number, since it is smaller than the sum of its proper divisors (697402688128).

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

666165210152 is a wasteful number, since it uses less digits than its factorization.

666165210152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87745773 (or 87745769 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 666165210152 in words is "six hundred sixty-six billion, one hundred sixty-five million, two hundred ten thousand, one hundred fifty-two".