66622221208 has 32 divisors (see below), whose sum is σ = 126201857760. Its totient is φ = 32970147840.

The previous prime is 66622221203. The next prime is 66622221209. The reversal of 66622221208 is 80212222666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194653 + ... + 413683.

It is an arithmetic number, because the mean of its divisors is an integer number (3943808055).

Almost surely, 2^66622221208 is an apocalyptic number.

It is an amenable number.

66622221208 is a deficient number, since it is larger than the sum of its proper divisors (59579636552).

66622221208 is a wasteful number, since it uses less digits than its factorization.

66622221208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219427 (or 219423 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 66622221208 in words is "sixty-six billion, six hundred twenty-two million, two hundred twenty-one thousand, two hundred eight".