66703366727 has 2 divisors, whose sum is σ = 66703366728. Its totient is φ = 66703366726.

The previous prime is 66703366693. The next prime is 66703366729. The reversal of 66703366727 is 72766330766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66703366727 - 2⁶ = 66703366663 is a prime.

Together with 66703366729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66703366729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351683363 + 33351683364.

It is an arithmetic number, because the mean of its divisors is an integer number (33351683364).

Almost surely, 2^66703366727 is an apocalyptic number.

66703366727 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703366727 is an equidigital number, since it uses as much as digits as its factorization.

66703366727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 53.

The spelling of 66703366727 in words is "sixty-six billion, seven hundred three million, three hundred sixty-six thousand, seven hundred twenty-seven".