665461115160013 has 16 divisors (see below), whose sum is σ = 680848806400000. Its totient is φ = 650247862897152.

The previous prime is 665461115160011. The next prime is 665461115160029. The reversal of 665461115160013 is 310061511164566.

It is a cyclic number.

It is not a de Polignac number, because 665461115160013 - 2¹ = 665461115160011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665461115160011) 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, 314269588 + ... + 316379986.

It is an arithmetic number, because the mean of its divisors is an integer number (42553050400000).

Almost surely, 2^{665461115160013} is an apocalyptic number.

It is an amenable number.

665461115160013 is a deficient number, since it is larger than the sum of its proper divisors (15387691239987).

665461115160013 is a wasteful number, since it uses less digits than its factorization.

665461115160013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151724.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 665461115160013 in words is "six hundred sixty-five trillion, four hundred sixty-one billion, one hundred fifteen million, one hundred sixty thousand, thirteen".