66102043666 has 8 divisors (see below), whose sum is σ = 99158989104. Its totient is φ = 33049047300.

The previous prime is 66102043571. The next prime is 66102043703. The reversal of 66102043666 is 66634020166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945060 + ... + 1012591.

It is an arithmetic number, because the mean of its divisors is an integer number (12394873638).

Almost surely, 2^66102043666 is an apocalyptic number.

66102043666 is a deficient number, since it is larger than the sum of its proper divisors (33056945438).

66102043666 is a wasteful number, since it uses less digits than its factorization.

66102043666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974536.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 66102043666 in words is "sixty-six billion, one hundred two million, forty-three thousand, six hundred sixty-six".