66888219212 has 24 divisors (see below), whose sum is σ = 122776606176. Its totient is φ = 31824258048.

The previous prime is 66888219169. The next prime is 66888219263. The reversal of 66888219212 is 21291288866.

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 7 ways as a sum of consecutive naturals, for example, 1865783 + ... + 1901294.

It is an arithmetic number, because the mean of its divisors is an integer number (5115691924).

Almost surely, 2^66888219212 is an apocalyptic number.

It is an amenable number.

66888219212 is a deficient number, since it is larger than the sum of its proper divisors (55888386964).

66888219212 is a wasteful number, since it uses less digits than its factorization.

66888219212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767297 (or 3767295 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 53.

The spelling of 66888219212 in words is "sixty-six billion, eight hundred eighty-eight million, two hundred nineteen thousand, two hundred twelve".