66511678066303 has 8 divisors (see below), whose sum is σ = 71121398330160. Its totient is φ = 61979432092800.

The previous prime is 66511678066291. The next prime is 66511678066313. The reversal of 66511678066303 is 30366087611566.

It is a happy number.

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 66511678066303 - 2¹⁷ = 66511677935231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66511678066313) 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, 19368570813 + ... + 19368574246.

It is an arithmetic number, because the mean of its divisors is an integer number (8890174791270).

Almost surely, 2^{66511678066303} is an apocalyptic number.

66511678066303 is a deficient number, since it is larger than the sum of its proper divisors (4609720263857).

66511678066303 is a wasteful number, since it uses less digits than its factorization.

66511678066303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38737145177.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 66511678066303 in words is "sixty-six trillion, five hundred eleven billion, six hundred seventy-eight million, sixty-six thousand, three hundred three".