66934069 has 2 divisors, whose sum is σ = 66934070. Its totient is φ = 66934068.

The previous prime is 66934067. The next prime is 66934121. The reversal of 66934069 is 96043966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 19847025 = 6862^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 66934069 - 2¹ = 66934067 is a prime.

It is a super-2 number, since 2×66934069² = 8960339185793522, which contains 22 as substring.

Together with 66934067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66934061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33467034 + 33467035.

It is an arithmetic number, because the mean of its divisors is an integer number (33467035).

Almost surely, 2^66934069 is an apocalyptic number.

It is an amenable number.

66934069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66934069 is an equidigital number, since it uses as much as digits as its factorization.

66934069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 66934069 is about 8181.3244037870. The cubic root of 66934069 is about 406.0215414812.

The spelling of 66934069 in words is "sixty-six million, nine hundred thirty-four thousand, sixty-nine".