127666243 has 8 divisors (see below), whose sum is σ = 138830112. Its totient is φ = 116908416.

The previous prime is 127666211. The next prime is 127666247. The reversal of 127666243 is 342666721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127666243 - 2⁵ = 127666211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127666247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100855 + ... + 102112.

It is an arithmetic number, because the mean of its divisors is an integer number (17353764).

Almost surely, 2^127666243 is an apocalyptic number.

127666243 is a deficient number, since it is larger than the sum of its proper divisors (11163869).

127666243 is a wasteful number, since it uses less digits than its factorization.

127666243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203021.

The product of its digits is 72576, while the sum is 37.

The square root of 127666243 is about 11298.9487564109. The cubic root of 127666243 is about 503.5300100746.

The spelling of 127666243 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, two hundred forty-three".