665516052 has 36 divisors (see below), whose sum is σ = 1718074176. Its totient is φ = 217118160.

The previous prime is 665516023. The next prime is 665516113. The reversal of 665516052 is 250615566.

It is a happy number.

665516052 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 (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 665515998 and 665516016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194974 + ... + 198357.

Almost surely, 2^665516052 is an apocalyptic number.

It is an amenable number.

665516052 is an abundant number, since it is smaller than the sum of its proper divisors (1052558124).

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

665516052 is a wasteful number, since it uses less digits than its factorization.

665516052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393388 (or 393383 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 665516052 is about 25797.5977951436. The cubic root of 665516052 is about 873.0775980747.

The spelling of 665516052 in words is "six hundred sixty-five million, five hundred sixteen thousand, fifty-two".