66732273791 has 2 divisors, whose sum is σ = 66732273792. Its totient is φ = 66732273790.

The previous prime is 66732273763. The next prime is 66732273799. The reversal of 66732273791 is 19737223766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66732273791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66732273799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33366136895 + 33366136896.

It is an arithmetic number, because the mean of its divisors is an integer number (33366136896).

Almost surely, 2^66732273791 is an apocalyptic number.

66732273791 is a deficient number, since it is larger than the sum of its proper divisors (1).

66732273791 is an equidigital number, since it uses as much as digits as its factorization.

66732273791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 53.

The spelling of 66732273791 in words is "sixty-six billion, seven hundred thirty-two million, two hundred seventy-three thousand, seven hundred ninety-one".