665555052 has 12 divisors (see below), whose sum is σ = 1552961816. Its totient is φ = 221851680.

The previous prime is 665555041. The next prime is 665555081. The reversal of 665555052 is 250555566.

665555052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665555052.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27731449 + ... + 27731472.

Almost surely, 2^665555052 is an apocalyptic number.

It is an amenable number.

665555052 is an abundant number, since it is smaller than the sum of its proper divisors (887406764).

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

665555052 is a wasteful number, since it uses less digits than its factorization.

665555052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55462928 (or 55462926 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 39.

The square root of 665555052 is about 25798.3536684030. The cubic root of 665555052 is about 873.0946521894.

The spelling of 665555052 in words is "six hundred sixty-five million, five hundred fifty-five thousand, fifty-two".