127666117 has 2 divisors, whose sum is σ = 127666118. Its totient is φ = 127666116.

The previous prime is 127666103. The next prime is 127666129. The reversal of 127666117 is 711666721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119377476 + 8288641 = 10926^2 + 2879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127666117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127666177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63833058 + 63833059.

It is an arithmetic number, because the mean of its divisors is an integer number (63833059).

Almost surely, 2^127666117 is an apocalyptic number.

It is an amenable number.

127666117 is a deficient number, since it is larger than the sum of its proper divisors (1).

127666117 is an equidigital number, since it uses as much as digits as its factorization.

127666117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 127666117 is about 11298.9431806696. The cubic root of 127666117 is about 503.5298444218.

The spelling of 127666117 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, one hundred seventeen".