66831933214979 has 2 divisors, whose sum is σ = 66831933214980. Its totient is φ = 66831933214978.

The previous prime is 66831933214973. The next prime is 66831933215077. The reversal of 66831933214979 is 97941233913866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66831933214979 - 2⁸ = 66831933214723 is a prime.

It is not a weakly prime, because it can be changed into another prime (66831933214973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33415966607489 + 33415966607490.

It is an arithmetic number, because the mean of its divisors is an integer number (33415966607490).

Almost surely, 2^{66831933214979} is an apocalyptic number.

66831933214979 is a deficient number, since it is larger than the sum of its proper divisors (1).

66831933214979 is an equidigital number, since it uses as much as digits as its factorization.

66831933214979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 71.

The spelling of 66831933214979 in words is "sixty-six trillion, eight hundred thirty-one billion, nine hundred thirty-three million, two hundred fourteen thousand, nine hundred seventy-nine".