66151808812 has 12 divisors (see below), whose sum is σ = 121858595320. Its totient is φ = 31335067296.

The previous prime is 66151808809. The next prime is 66151808819. The reversal of 66151808812 is 21880815166.

It is not an unprimeable number, because it can be changed into a prime (66151808819) by changing a digit.

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, 435209193 + ... + 435209344.

Almost surely, 2^66151808812 is an apocalyptic number.

It is an amenable number.

66151808812 is a deficient number, since it is larger than the sum of its proper divisors (55706786508).

66151808812 is a wasteful number, since it uses less digits than its factorization.

66151808812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870418560 (or 870418558 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 66151808812 in words is "sixty-six billion, one hundred fifty-one million, eight hundred eight thousand, eight hundred twelve".