665265260913 has 16 divisors (see below), whose sum is σ = 967681200576. Its totient is φ = 403181634240.

The previous prime is 665265260911. The next prime is 665265260923. The reversal of 665265260913 is 319062562566.

It is a happy number.

665265260913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665265260913 - 2¹ = 665265260911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665265260911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1356531 + ... + 1780647.

It is an arithmetic number, because the mean of its divisors is an integer number (60480075036).

Almost surely, 2^665265260913 is an apocalyptic number.

It is an amenable number.

665265260913 is a deficient number, since it is larger than the sum of its proper divisors (302415939663).

665265260913 is a wasteful number, since it uses less digits than its factorization.

665265260913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471664.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 665265260913 in words is "six hundred sixty-five billion, two hundred sixty-five million, two hundred sixty thousand, nine hundred thirteen".