66266128912 has 40 divisors (see below), whose sum is σ = 134059276800. Its totient is φ = 31691544192.

The previous prime is 66266128879. The next prime is 66266128919. The reversal of 66266128912 is 21982166266.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66266128919) 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 7 ways as a sum of consecutive naturals, for example, 617712 + ... + 717007.

It is an arithmetic number, because the mean of its divisors is an integer number (3351481920).

Almost surely, 2^66266128912 is an apocalyptic number.

It is an amenable number.

66266128912 is an abundant number, since it is smaller than the sum of its proper divisors (67793147888).

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

66266128912 is a wasteful number, since it uses less digits than its factorization.

66266128912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334863 (or 1334857 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The spelling of 66266128912 in words is "sixty-six billion, two hundred sixty-six million, one hundred twenty-eight thousand, nine hundred twelve".