66127147 has 2 divisors, whose sum is σ = 66127148. Its totient is φ = 66127146.

The previous prime is 66127129. The next prime is 66127169. The reversal of 66127147 is 74172166.

It is a happy number.

66127147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66127147 is a prime.

It is not a weakly prime, because it can be changed into another prime (66167147) 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 as a sum of consecutive naturals, namely, 33063573 + 33063574.

It is an arithmetic number, because the mean of its divisors is an integer number (33063574).

Almost surely, 2^66127147 is an apocalyptic number.

66127147 is a deficient number, since it is larger than the sum of its proper divisors (1).

66127147 is an equidigital number, since it uses as much as digits as its factorization.

66127147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 66127147 is about 8131.8599963354. The cubic root of 66127147 is about 404.3833464750.

The spelling of 66127147 in words is "sixty-six million, one hundred twenty-seven thousand, one hundred forty-seven".