66532199999 has 4 divisors (see below), whose sum is σ = 66535047864. Its totient is φ = 66529352136.

The previous prime is 66532199977. The next prime is 66532200011. The reversal of 66532199999 is 99999123566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999123566 = 2 ⋅49999561783.

It is a cyclic number.

It is not a de Polignac number, because 66532199999 - 2³² = 62237232703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66532199299) 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, 1388597 + ... + 1435710.

It is an arithmetic number, because the mean of its divisors is an integer number (16633761966).

Almost surely, 2^66532199999 is an apocalyptic number.

66532199999 is a deficient number, since it is larger than the sum of its proper divisors (2847865).

66532199999 is a wasteful number, since it uses less digits than its factorization.

66532199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847864.

The product of its digits is 63772920, while the sum is 68.

The spelling of 66532199999 in words is "sixty-six billion, five hundred thirty-two million, one hundred ninety-nine thousand, nine hundred ninety-nine".