66028022608 has 20 divisors (see below), whose sum is σ = 129248155540. Its totient is φ = 32673659904.

The previous prime is 66028022581. The next prime is 66028022633. The reversal of 66028022608 is 80622082066.

It can be written as a sum of positive squares in 2 ways, for example, as 22400510224 + 43627512384 = 149668^2 + 208872^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21270363 + ... + 21273466.

It is an arithmetic number, because the mean of its divisors is an integer number (6462407777).

Almost surely, 2^66028022608 is an apocalyptic number.

It is an amenable number.

66028022608 is a deficient number, since it is larger than the sum of its proper divisors (63220132932).

66028022608 is a wasteful number, since it uses less digits than its factorization.

66028022608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42543934 (or 42543928 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 66028022608 in words is "sixty-six billion, twenty-eight million, twenty-two thousand, six hundred eight".