66320033999 has 4 divisors (see below), whose sum is σ = 66578088864. Its totient is φ = 66061979136.

The previous prime is 66320033977. The next prime is 66320034013. The reversal of 66320033999 is 99933002366.

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 66320033999 - 2⁸ = 66320033743 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 (66320030999) 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, 129027047 + ... + 129027560.

It is an arithmetic number, because the mean of its divisors is an integer number (16644522216).

Almost surely, 2^66320033999 is an apocalyptic number.

66320033999 is a deficient number, since it is larger than the sum of its proper divisors (258054865).

66320033999 is a wasteful number, since it uses less digits than its factorization.

66320033999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258054864.

The product of its (nonzero) digits is 1417176, while the sum is 50.

The spelling of 66320033999 in words is "sixty-six billion, three hundred twenty million, thirty-three thousand, nine hundred ninety-nine".