66306047 has 2 divisors, whose sum is σ = 66306048. Its totient is φ = 66306046.

The previous prime is 66306017. The next prime is 66306083. The reversal of 66306047 is 74060366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66306047 - 2⁶ = 66305983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66306007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33153023 + 33153024.

It is an arithmetic number, because the mean of its divisors is an integer number (33153024).

Almost surely, 2^66306047 is an apocalyptic number.

66306047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66306047 is an equidigital number, since it uses as much as digits as its factorization.

66306047 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 32.

The square root of 66306047 is about 8142.8525100237. The cubic root of 66306047 is about 404.7476902279.

It can be divided in two parts, 66 and 306047, that multiplied together give a palindrome (20199102).

The spelling of 66306047 in words is "sixty-six million, three hundred six thousand, forty-seven".