66666330613 has 16 divisors (see below), whose sum is σ = 68789675520. Its totient is φ = 64577142000.

The previous prime is 66666330593. The next prime is 66666330629. The reversal of 66666330613 is 31603366666.

It is a cyclic number.

It is not a de Polignac number, because 66666330613 - 2⁵ = 66666330581 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 (66666330683) 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, 10331038 + ... + 10337488.

It is an arithmetic number, because the mean of its divisors is an integer number (4299354720).

Almost surely, 2^66666330613 is an apocalyptic number.

It is an amenable number.

66666330613 is a deficient number, since it is larger than the sum of its proper divisors (2123344907).

66666330613 is a wasteful number, since it uses less digits than its factorization.

66666330613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9048.

The product of its (nonzero) digits is 1259712, while the sum is 46.

The spelling of 66666330613 in words is "sixty-six billion, six hundred sixty-six million, three hundred thirty thousand, six hundred thirteen".