66167056765127 has 2 divisors, whose sum is σ = 66167056765128. Its totient is φ = 66167056765126.

The previous prime is 66167056765081. The next prime is 66167056765151. The reversal of 66167056765127 is 72156765076166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66167056765127 - 2¹⁸ = 66167056502983 is a prime.

It is a super-2 number, since 2×66167056765127² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66167056465127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33083528382563 + 33083528382564.

It is an arithmetic number, because the mean of its divisors is an integer number (33083528382564).

Almost surely, 2^{66167056765127} is an apocalyptic number.

66167056765127 is a deficient number, since it is larger than the sum of its proper divisors (1).

66167056765127 is an equidigital number, since it uses as much as digits as its factorization.

66167056765127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 133358400, while the sum is 65.

The spelling of 66167056765127 in words is "sixty-six trillion, one hundred sixty-seven billion, fifty-six million, seven hundred sixty-five thousand, one hundred twenty-seven".