865766652 has 12 divisors (see below), whose sum is σ = 2020122216. Its totient is φ = 288588880.

The previous prime is 865766593. The next prime is 865766653. The reversal of 865766652 is 256667568.

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

It is a junction number, because it is equal to n+sod(n) for n = 865766595 and 865766604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865766653) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36073599 + ... + 36073622.

It is an arithmetic number, because the mean of its divisors is an integer number (168343518).

Almost surely, 2^865766652 is an apocalyptic number.

It is an amenable number.

865766652 is an abundant number, since it is smaller than the sum of its proper divisors (1154355564).

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

865766652 is a wasteful number, since it uses less digits than its factorization.

865766652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72147228 (or 72147226 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The square root of 865766652 is about 29423.9129280930. The cubic root of 865766652 is about 953.0893524778.

The spelling of 865766652 in words is "eight hundred sixty-five million, seven hundred sixty-six thousand, six hundred fifty-two".