66065471 has 2 divisors, whose sum is σ = 66065472. Its totient is φ = 66065470.

The previous prime is 66065437. The next prime is 66065477. The reversal of 66065471 is 17456066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66065471 - 2²² = 61871167 is a prime.

It is a super-3 number, since 3×66065471³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66065477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33032735 + 33032736.

It is an arithmetic number, because the mean of its divisors is an integer number (33032736).

Almost surely, 2^66065471 is an apocalyptic number.

66065471 is a deficient number, since it is larger than the sum of its proper divisors (1).

66065471 is an equidigital number, since it uses as much as digits as its factorization.

66065471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66065471 is about 8128.0668673431. The cubic root of 66065471 is about 404.2575861965.

The spelling of 66065471 in words is "sixty-six million, sixty-five thousand, four hundred seventy-one".