665700542664117 has 4 divisors (see below), whose sum is σ = 887600723552160. Its totient is φ = 443800361776076.

The previous prime is 665700542664077. The next prime is 665700542664137. The reversal of 665700542664117 is 711466245007566.

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 665700542664117 - 2¹¹ = 665700542662069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665700542664137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110950090444017 + ... + 110950090444022.

It is an arithmetic number, because the mean of its divisors is an integer number (221900180888040).

Almost surely, 2^{665700542664117} is an apocalyptic number.

It is an amenable number.

665700542664117 is a deficient number, since it is larger than the sum of its proper divisors (221900180888043).

665700542664117 is a wasteful number, since it uses less digits than its factorization.

665700542664117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221900180888042.

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 665700542664117 in words is "six hundred sixty-five trillion, seven hundred billion, five hundred forty-two million, six hundred sixty-four thousand, one hundred seventeen".