71666127 has 20 divisors (see below), whose sum is σ = 115293640. Its totient is φ = 44101584.

The previous prime is 71666113. The next prime is 71666159. The reversal of 71666127 is 72166617.

It is not a de Polignac number, because 71666127 - 2¹⁰ = 71665103 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 71666091 and 71666100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71666107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32977 + ... + 35082.

It is an arithmetic number, because the mean of its divisors is an integer number (5764682).

Almost surely, 2^71666127 is an apocalyptic number.

71666127 is a deficient number, since it is larger than the sum of its proper divisors (43627513).

71666127 is a wasteful number, since it uses less digits than its factorization.

71666127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68084 (or 68075 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 71666127 is about 8465.5848587088. The cubic root of 71666127 is about 415.3727275088.

The spelling of 71666127 in words is "seventy-one million, six hundred sixty-six thousand, one hundred twenty-seven".