127666137 has 4 divisors (see below), whose sum is σ = 170221520. Its totient is φ = 85110756.

The previous prime is 127666129. The next prime is 127666151. The reversal of 127666137 is 731666721.

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 not a de Polignac number, because 127666137 - 2³ = 127666129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127666095 and 127666104.

It is not an unprimeable number, because it can be changed into a prime (127666117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21277687 + ... + 21277692.

It is an arithmetic number, because the mean of its divisors is an integer number (42555380).

Almost surely, 2^127666137 is an apocalyptic number.

It is an amenable number.

127666137 is a deficient number, since it is larger than the sum of its proper divisors (42555383).

127666137 is an equidigital number, since it uses as much as digits as its factorization.

127666137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42555382.

The product of its digits is 63504, while the sum is 39.

The square root of 127666137 is about 11298.9440657081. The cubic root of 127666137 is about 503.5298707159.

The spelling of 127666137 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, one hundred thirty-seven".