665101565052 has 12 divisors (see below), whose sum is σ = 1551903651816. Its totient is φ = 221700521680.

The previous prime is 665101565047. The next prime is 665101565053. The reversal of 665101565052 is 250565101566.

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 = 665101564995 and 665101565013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665101565053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27712565199 + ... + 27712565222.

It is an arithmetic number, because the mean of its divisors is an integer number (129325304318).

Almost surely, 2^665101565052 is an apocalyptic number.

It is an amenable number.

665101565052 is an abundant number, since it is smaller than the sum of its proper divisors (886802086764).

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

665101565052 is a wasteful number, since it uses less digits than its factorization.

665101565052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55425130428 (or 55425130426 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 665101565052 in words is "six hundred sixty-five billion, one hundred one million, five hundred sixty-five thousand, fifty-two".