66120316166 has 4 divisors (see below), whose sum is σ = 99180474252. Its totient is φ = 33060158082.

The previous prime is 66120316147. The next prime is 66120316177. The reversal of 66120316166 is 66161302166.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16530079040 + ... + 16530079043.

It is an arithmetic number, because the mean of its divisors is an integer number (24795118563).

Almost surely, 2^66120316166 is an apocalyptic number.

66120316166 is a deficient number, since it is larger than the sum of its proper divisors (33060158086).

66120316166 is a wasteful number, since it uses less digits than its factorization.

66120316166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33060158085.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 66120316166 in words is "sixty-six billion, one hundred twenty million, three hundred sixteen thousand, one hundred sixty-six".