66603738127 has 2 divisors, whose sum is σ = 66603738128. Its totient is φ = 66603738126.

The previous prime is 66603738083. The next prime is 66603738143. The reversal of 66603738127 is 72183730666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66603738127 - 2²⁷ = 66469520399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66603738527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33301869063 + 33301869064.

It is an arithmetic number, because the mean of its divisors is an integer number (33301869064).

Almost surely, 2^66603738127 is an apocalyptic number.

66603738127 is a deficient number, since it is larger than the sum of its proper divisors (1).

66603738127 is an equidigital number, since it uses as much as digits as its factorization.

66603738127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 66603738127 in words is "sixty-six billion, six hundred three million, seven hundred thirty-eight thousand, one hundred twenty-seven".