127881366677 has 4 divisors (see below), whose sum is σ = 127899108096. Its totient is φ = 127863625260.

The previous prime is 127881366659. The next prime is 127881366713. The reversal of 127881366677 is 776663188721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127881366677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127881366647) 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 in 3 ways as a sum of consecutive naturals, for example, 8859893 + ... + 8874314.

It is an arithmetic number, because the mean of its divisors is an integer number (31974777024).

Almost surely, 2^127881366677 is an apocalyptic number.

It is an amenable number.

127881366677 is a deficient number, since it is larger than the sum of its proper divisors (17741419).

127881366677 is an equidigital number, since it uses as much as digits as its factorization.

127881366677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17741418.

The product of its digits is 28449792, while the sum is 62.

The spelling of 127881366677 in words is "one hundred twenty-seven billion, eight hundred eighty-one million, three hundred sixty-six thousand, six hundred seventy-seven".