66275071 has 2 divisors, whose sum is σ = 66275072. Its totient is φ = 66275070.

The previous prime is 66275057. The next prime is 66275081. The reversal of 66275071 is 17057266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66275071 - 2⁵ = 66275039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66275081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33137535 + 33137536.

It is an arithmetic number, because the mean of its divisors is an integer number (33137536).

Almost surely, 2^66275071 is an apocalyptic number.

66275071 is a deficient number, since it is larger than the sum of its proper divisors (1).

66275071 is an equidigital number, since it uses as much as digits as its factorization.

66275071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66275071 is about 8140.9502516598. The cubic root of 66275071 is about 404.6846521497.

The spelling of 66275071 in words is "sixty-six million, two hundred seventy-five thousand, seventy-one".