66115851166 has 8 divisors (see below), whose sum is σ = 99177738984. Its totient is φ = 33056604840.

The previous prime is 66115851149. The next prime is 66115851203.

It is a happy number.

66115851166 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596565 + ... + 698656.

It is an arithmetic number, because the mean of its divisors is an integer number (12397217373).

Almost surely, 2^66115851166 is an apocalyptic number.

66115851166 is a deficient number, since it is larger than the sum of its proper divisors (33061887818).

66115851166 is a wasteful number, since it uses less digits than its factorization.

66115851166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320746.

The product of its digits is 259200, while the sum is 46.

The spelling of 66115851166 in words is "sixty-six billion, one hundred fifteen million, eight hundred fifty-one thousand, one hundred sixty-six".