66066666066 has 32 divisors (see below), whose sum is σ = 153198069120. Its totient is φ = 21064733712.

The previous prime is 66066666023. The next prime is 66066666067.

66066666066 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66066666067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26595645 + ... + 26598128.

It is an arithmetic number, because the mean of its divisors is an integer number (4787439660).

Almost surely, 2^66066666066 is an apocalyptic number.

66066666066 is an abundant number, since it is smaller than the sum of its proper divisors (87131403054).

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

66066666066 is a wasteful number, since it uses less digits than its factorization.

66066666066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53193807 (or 53193801 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 54.

The spelling of 66066666066 in words is "sixty-six billion, sixty-six million, six hundred sixty-six thousand, sixty-six".