66184379899 has 4 divisors (see below), whose sum is σ = 72201141720. Its totient is φ = 60167618080.

The previous prime is 66184379873. The next prime is 66184379953. The reversal of 66184379899 is 99897348166.

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

It is a cyclic number.

It is not a de Polignac number, because 66184379899 - 2⁵ = 66184379867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66184379839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3008380894 + ... + 3008380915.

It is an arithmetic number, because the mean of its divisors is an integer number (18050285430).

Almost surely, 2^66184379899 is an apocalyptic number.

66184379899 is a deficient number, since it is larger than the sum of its proper divisors (6016761821).

66184379899 is a wasteful number, since it uses less digits than its factorization.

66184379899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016761820.

The product of its digits is 141087744, while the sum is 70.

The spelling of 66184379899 in words is "sixty-six billion, one hundred eighty-four million, three hundred seventy-nine thousand, eight hundred ninety-nine".