660534458813 has 4 divisors (see below), whose sum is σ = 660570137568. Its totient is φ = 660498780060.

The previous prime is 660534458791. The next prime is 660534458851. The reversal of 660534458813 is 318854435066.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318854435066 = 2 ⋅159427217533.

It is a cyclic number.

It is not a de Polignac number, because 660534458813 - 2³⁸ = 385656551869 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 (660534458863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17811593 + ... + 17848638.

It is an arithmetic number, because the mean of its divisors is an integer number (165142534392).

Almost surely, 2^660534458813 is an apocalyptic number.

It is an amenable number.

660534458813 is a deficient number, since it is larger than the sum of its proper divisors (35678755).

660534458813 is a wasteful number, since it uses less digits than its factorization.

660534458813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35678754.

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 660534458813 in words is "six hundred sixty billion, five hundred thirty-four million, four hundred fifty-eight thousand, eight hundred thirteen".