66622221207 has 12 divisors (see below), whose sum is σ = 96322131880. Its totient is φ = 44373259728.

The previous prime is 66622221203. The next prime is 66622221209. The reversal of 66622221207 is 70212222666.

It is not a de Polignac number, because 66622221207 - 2² = 66622221203 is a prime.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3452713 + ... + 3471954.

Almost surely, 2^66622221207 is an apocalyptic number.

66622221207 is a deficient number, since it is larger than the sum of its proper divisors (29699910673).

66622221207 is a wasteful number, since it uses less digits than its factorization.

66622221207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925742 (or 6925739 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 66622221207 in words is "sixty-six billion, six hundred twenty-two million, two hundred twenty-one thousand, two hundred seven".