660323345613 has 4 divisors (see below), whose sum is σ = 880431127488. Its totient is φ = 440215563740.

The previous prime is 660323345611. The next prime is 660323345621. The reversal of 660323345613 is 316543323066.

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.

It is a cyclic number.

It is not a de Polignac number, because 660323345613 - 2¹ = 660323345611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660323345611) 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, 110053890933 + ... + 110053890938.

It is an arithmetic number, because the mean of its divisors is an integer number (220107781872).

Almost surely, 2^660323345613 is an apocalyptic number.

It is an amenable number.

660323345613 is a deficient number, since it is larger than the sum of its proper divisors (220107781875).

660323345613 is a wasteful number, since it uses less digits than its factorization.

660323345613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220107781874.

The product of its (nonzero) digits is 699840, while the sum is 42.

Adding to 660323345613 its reverse (316543323066), we get a palindrome (976866668679).

The spelling of 660323345613 in words is "six hundred sixty billion, three hundred twenty-three million, three hundred forty-five thousand, six hundred thirteen".