66069347 has 2 divisors, whose sum is σ = 66069348. Its totient is φ = 66069346.

The previous prime is 66069343. The next prime is 66069379. The reversal of 66069347 is 74396066.

It is a happy number.

66069347 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 not a de Polignac number, because 66069347 - 2² = 66069343 is a prime.

It is a super-2 number, since 2×66069347² = 8730317226012818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66069343) 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, 33034673 + 33034674.

It is an arithmetic number, because the mean of its divisors is an integer number (33034674).

Almost surely, 2^66069347 is an apocalyptic number.

66069347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66069347 is an equidigital number, since it uses as much as digits as its factorization.

66069347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 66069347 is about 8128.3052969238. The cubic root of 66069347 is about 404.2654918479.

It can be divided in two parts, 660 and 69347, that added together give a palindrome (70007).

The spelling of 66069347 in words is "sixty-six million, sixty-nine thousand, three hundred forty-seven".