665586435241 has 16 divisors (see below), whose sum is σ = 819248948224. Its totient is φ = 526575639744.

The previous prime is 665586435221. The next prime is 665586435251. The reversal of 665586435241 is 142534685566.

It is a happy number.

It is not a de Polignac number, because 665586435241 - 2¹⁵ = 665586402473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665586435211) 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 15 ways as a sum of consecutive naturals, for example, 874216 + ... + 1447558.

It is an arithmetic number, because the mean of its divisors is an integer number (51203059264).

Almost surely, 2^665586435241 is an apocalyptic number.

It is an amenable number.

665586435241 is a deficient number, since it is larger than the sum of its proper divisors (153662512983).

665586435241 is a wasteful number, since it uses less digits than its factorization.

665586435241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586120.

The product of its digits is 20736000, while the sum is 55.

The spelling of 665586435241 in words is "six hundred sixty-five billion, five hundred eighty-six million, four hundred thirty-five thousand, two hundred forty-one".