66552830609 has 4 divisors (see below), whose sum is σ = 66653516340. Its totient is φ = 66452144880.

The previous prime is 66552830573. The next prime is 66552830627. The reversal of 66552830609 is 90603825566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46425166225 + 20127664384 = 215465^2 + 141872^2 .

It is a cyclic number.

It is not a de Polignac number, because 66552830609 - 2⁸ = 66552830353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66552880609) 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 3 ways as a sum of consecutive naturals, for example, 50341874 + ... + 50343195.

It is an arithmetic number, because the mean of its divisors is an integer number (16663379085).

Almost surely, 2^66552830609 is an apocalyptic number.

It is an amenable number.

66552830609 is a deficient number, since it is larger than the sum of its proper divisors (100685731).

66552830609 is a wasteful number, since it uses less digits than its factorization.

66552830609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100685730.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 66552830609 in words is "sixty-six billion, five hundred fifty-two million, eight hundred thirty thousand, six hundred nine".