665505461055 has 16 divisors (see below), whose sum is σ = 1077637760640. Its totient is φ = 350659904928.

The previous prime is 665505460999. The next prime is 665505461057. The reversal of 665505461055 is 550164505566.

It is not a de Polignac number, because 665505461055 - 2¹¹ = 665505459007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665505460995 and 665505461013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665505461057) 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, 267270025 + ... + 267272514.

It is an arithmetic number, because the mean of its divisors is an integer number (67352360040).

Almost surely, 2^665505461055 is an apocalyptic number.

665505461055 is a deficient number, since it is larger than the sum of its proper divisors (412132299585).

665505461055 is a wasteful number, since it uses less digits than its factorization.

665505461055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534542630.

The product of its (nonzero) digits is 2700000, while the sum is 48.

The spelling of 665505461055 in words is "six hundred sixty-five billion, five hundred five million, four hundred sixty-one thousand, fifty-five".