127866669653 has 2 divisors, whose sum is σ = 127866669654. Its totient is φ = 127866669652.

The previous prime is 127866669643. The next prime is 127866669673. The reversal of 127866669653 is 356966668721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65577990724 + 62288678929 = 256082^2 + 249577^2 .

It is a cyclic number.

It is not a de Polignac number, because 127866669653 - 2⁶ = 127866669589 is a prime.

It is a super-2 number, since 2×127866669653² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127866669653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127866669643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63933334826 + 63933334827.

It is an arithmetic number, because the mean of its divisors is an integer number (63933334827).

Almost surely, 2^127866669653 is an apocalyptic number.

It is an amenable number.

127866669653 is a deficient number, since it is larger than the sum of its proper divisors (1).

127866669653 is an equidigital number, since it uses as much as digits as its factorization.

127866669653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 65.

The spelling of 127866669653 in words is "one hundred twenty-seven billion, eight hundred sixty-six million, six hundred sixty-nine thousand, six hundred fifty-three".