66613045013 has 8 divisors (see below), whose sum is σ = 67005939000. Its totient is φ = 66220424640.

The previous prime is 66613045007. The next prime is 66613045033. The reversal of 66613045013 is 31054031666.

66613045013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 696590449 + 65916454564 = 26393^2 + 256742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66613045013 - 2¹⁸ = 66612782869 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 (66613045033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430631 + ... + 564507.

It is an arithmetic number, because the mean of its divisors is an integer number (8375742375).

Almost surely, 2^66613045013 is an apocalyptic number.

It is an amenable number.

66613045013 is a deficient number, since it is larger than the sum of its proper divisors (392893987).

66613045013 is a wasteful number, since it uses less digits than its factorization.

66613045013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136807.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 66613045013 its reverse (31054031666), we get a palindrome (97667076679).

The spelling of 66613045013 in words is "sixty-six billion, six hundred thirteen million, forty-five thousand, thirteen".