66666666706 has 16 divisors (see below), whose sum is σ = 100101464064. Its totient is φ = 33299532864.

The previous prime is 66666666697. The next prime is 66666666709. The reversal of 66666666706 is 60766666666.

66666666706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66666666709) 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, 13419435 + ... + 13424401.

It is an arithmetic number, because the mean of its divisors is an integer number (6256341504).

Almost surely, 2^66666666706 is an apocalyptic number.

66666666706 is a deficient number, since it is larger than the sum of its proper divisors (33434797358).

66666666706 is a wasteful number, since it uses less digits than its factorization.

66666666706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10425.

The product of its (nonzero) digits is 70543872, while the sum is 61.

The spelling of 66666666706 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred six".