665663474113 has 4 divisors (see below), whose sum is σ = 726178335408. Its totient is φ = 605148612820.

The previous prime is 665663474093. The next prime is 665663474141. The reversal of 665663474113 is 311474366566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 665663474113 - 2⁵ = 665663474081 is a prime.

It is a super-2 number, since 2×665663474113² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665663474143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30257430631 + ... + 30257430652.

It is an arithmetic number, because the mean of its divisors is an integer number (181544583852).

Almost surely, 2^665663474113 is an apocalyptic number.

It is an amenable number.

665663474113 is a deficient number, since it is larger than the sum of its proper divisors (60514861295).

665663474113 is a wasteful number, since it uses less digits than its factorization.

665663474113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60514861294.

The product of its digits is 6531840, while the sum is 52.

The spelling of 665663474113 in words is "six hundred sixty-five billion, six hundred sixty-three million, four hundred seventy-four thousand, one hundred thirteen".