66676667666 has 16 divisors (see below), whose sum is σ = 114895106304. Its totient is φ = 28427652864.

The previous prime is 66676667653. The next prime is 66676667669.

66676667666 is nontrivially palindromic in base 10.

66676667666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66676667666² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66676667596 and 66676667605.

It is not an unprimeable number, because it can be changed into a prime (66676667669) 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, 12335690 + ... + 12341093.

It is an arithmetic number, because the mean of its divisors is an integer number (7180944144).

Almost surely, 2^66676667666 is an apocalyptic number.

66676667666 is a deficient number, since it is larger than the sum of its proper divisors (48218438638).

66676667666 is a wasteful number, since it uses less digits than its factorization.

66676667666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24676985.

The product of its digits is 493807104, while the sum is 68.

The spelling of 66676667666 in words is "sixty-six billion, six hundred seventy-six million, six hundred sixty-seven thousand, six hundred sixty-six".