66282220418 has 6 divisors (see below), whose sum is σ = 99423876771. Its totient is φ = 33140928162.

The previous prime is 66282220393. The next prime is 66282220439. The reversal of 66282220418 is 81402228266.

It can be written as a sum of positive squares in only one way, i.e., 33141110209 + 33141110209 = 182047^2 + 182047^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=182047.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 273071 + ... + 455117.

Almost surely, 2^66282220418 is an apocalyptic number.

66282220418 is a deficient number, since it is larger than the sum of its proper divisors (33141656353).

66282220418 is an frugal number, since it uses more digits than its factorization.

66282220418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364096 (or 182049 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 66282220418 in words is "sixty-six billion, two hundred eighty-two million, two hundred twenty thousand, four hundred eighteen".