66667366127 has 2 divisors, whose sum is σ = 66667366128. Its totient is φ = 66667366126.

The previous prime is 66667366093. The next prime is 66667366133. The reversal of 66667366127 is 72166376666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66667366127 - 2¹² = 66667362031 is a prime.

It is a super-2 number, since 2×66667366127² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66667366147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333683063 + 33333683064.

It is an arithmetic number, because the mean of its divisors is an integer number (33333683064).

Almost surely, 2^66667366127 is an apocalyptic number.

66667366127 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667366127 is an equidigital number, since it uses as much as digits as its factorization.

66667366127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 56.

The spelling of 66667366127 in words is "sixty-six billion, six hundred sixty-seven million, three hundred sixty-six thousand, one hundred twenty-seven".