66666666666 has 16 divisors (see below), whose sum is σ = 133339752000. Its totient is φ = 22221152448.

The previous prime is 66666666643. The next prime is 66666666667.

66666666666 is nontrivially palindromic in base 10.

66666666666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

66666666666 is a modest number, since divided by 666666 gives 66666 as remainder.

66666666666 is a nontrivial repdigit in base 10.

It is a plaindrome in base 10.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66666666597 and 66666666606.

It is not an unprimeable number, because it can be changed into a prime (66666666667) 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, 126726 + ... + 386513.

It is an arithmetic number, because the mean of its divisors is an integer number (8333734500).

Almost surely, 2^66666666666 is an apocalyptic number.

66666666666 is an abundant number, since it is smaller than the sum of its proper divisors (66673085334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66666666666 is a wasteful number, since it uses less digits than its factorization.

66666666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534893.

The product of its digits is 362797056, while the sum is 66.

The spelling of 66666666666 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".