66071429 has 2 divisors, whose sum is σ = 66071430. Its totient is φ = 66071428.

The previous prime is 66071407. The next prime is 66071431. The reversal of 66071429 is 92417066.

66071429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 429025 = 8102^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 66071429 - 2²⁴ = 49294213 is a prime.

It is a Sophie Germain prime.

Together with 66071431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66071329) 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, 33035714 + 33035715.

It is an arithmetic number, because the mean of its divisors is an integer number (33035715).

Almost surely, 2^66071429 is an apocalyptic number.

It is an amenable number.

66071429 is a deficient number, since it is larger than the sum of its proper divisors (1).

66071429 is an equidigital number, since it uses as much as digits as its factorization.

66071429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 66071429 is about 8128.4333668918. The cubic root of 66071429 is about 404.2697382544.

The spelling of 66071429 in words is "sixty-six million, seventy-one thousand, four hundred twenty-nine".