66666614811 has 16 divisors (see below), whose sum is σ = 90800206848. Its totient is φ = 43489136000.

The previous prime is 66666614803. The next prime is 66666614851. The reversal of 66666614811 is 11841666666.

66666614811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66666614811 - 2³ = 66666614803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66666614851) 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, 615586 + ... + 715736.

It is an arithmetic number, because the mean of its divisors is an integer number (5675012928).

Almost surely, 2^66666614811 is an apocalyptic number.

66666614811 is a deficient number, since it is larger than the sum of its proper divisors (24133592037).

66666614811 is a wasteful number, since it uses less digits than its factorization.

66666614811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104922.

The product of its digits is 1492992, while the sum is 51.

The spelling of 66666614811 in words is "sixty-six billion, six hundred sixty-six million, six hundred fourteen thousand, eight hundred eleven".