66609034206 has 48 divisors (see below), whose sum is σ = 157693629072. Its totient is φ = 18631895040.

The previous prime is 66609034199. The next prime is 66609034207. The reversal of 66609034206 is 60243090666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66609034207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3519331 + ... + 3538206.

It is an arithmetic number, because the mean of its divisors is an integer number (3285283939).

Almost surely, 2^66609034206 is an apocalyptic number.

66609034206 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66609034206 is an abundant number, since it is smaller than the sum of its proper divisors (91084594866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66609034206 is a wasteful number, since it uses less digits than its factorization.

66609034206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7057577 (or 7057566 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 66609034206 in words is "sixty-six billion, six hundred nine million, thirty-four thousand, two hundred six".