127866714660605 has 4 divisors (see below), whose sum is σ = 153440057592732. Its totient is φ = 102293371728480.

The previous prime is 127866714660599. The next prime is 127866714660617. The reversal of 127866714660605 is 506066417668721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29337843939364 + 98528870721241 = 5416442^2 + 9926171^2 .

It is a de Polignac number, because none of the positive numbers 2^k-127866714660605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12786671466056 + ... + 12786671466065.

It is an arithmetic number, because the mean of its divisors is an integer number (38360014398183).

Almost surely, 2^{127866714660605} is an apocalyptic number.

It is an amenable number.

127866714660605 is a deficient number, since it is larger than the sum of its proper divisors (25573342932127).

127866714660605 is an equidigital number, since it uses as much as digits as its factorization.

127866714660605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25573342932126.

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 127866714660605 in words is "one hundred twenty-seven trillion, eight hundred sixty-six billion, seven hundred fourteen million, six hundred sixty thousand, six hundred five".