66666066668 has 24 divisors (see below), whose sum is σ = 117600000000. Its totient is φ = 33066869328.

The previous prime is 66666066667. The next prime is 66666066683. The reversal of 66666066668 is 86666066666.

It is a self number, because there is not a number n which added to its sum of digits gives 66666066668.

It is not an unprimeable number, because it can be changed into a prime (66666066667) 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, 233333 + ... + 433331.

It is an arithmetic number, because the mean of its divisors is an integer number (4900000000).

Almost surely, 2^66666066668 is an apocalyptic number.

It is an amenable number.

66666066668 is a deficient number, since it is larger than the sum of its proper divisors (50933933332).

66666066668 is a wasteful number, since it uses less digits than its factorization.

66666066668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200669 (or 200667 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 62.

The spelling of 66666066668 in words is "sixty-six billion, six hundred sixty-six million, sixty-six thousand, six hundred sixty-eight".