66831933214999 has 4 divisors (see below), whose sum is σ = 66832043896800. Its totient is φ = 66831822533200.

The previous prime is 66831933214979. The next prime is 66831933215077. The reversal of 66831933214999 is 99941233913866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66831933214999 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 (66831933214919) 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, 54430174 + ... + 55644475.

It is an arithmetic number, because the mean of its divisors is an integer number (16708010974200).

Almost surely, 2^{66831933214999} is an apocalyptic number.

66831933214999 is a deficient number, since it is larger than the sum of its proper divisors (110681801).

66831933214999 is a wasteful number, since it uses less digits than its factorization.

66831933214999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110681800.

The product of its digits is 408146688, while the sum is 73.

The spelling of 66831933214999 in words is "sixty-six trillion, eight hundred thirty-one billion, nine hundred thirty-three million, two hundred fourteen thousand, nine hundred ninety-nine".