66939107 has 2 divisors, whose sum is σ = 66939108. Its totient is φ = 66939106.

The previous prime is 66939091. The next prime is 66939121. The reversal of 66939107 is 70193966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66939107 - 2⁴ = 66939091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66939127) 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, 33469553 + 33469554.

It is an arithmetic number, because the mean of its divisors is an integer number (33469554).

Almost surely, 2^66939107 is an apocalyptic number.

66939107 is a deficient number, since it is larger than the sum of its proper divisors (1).

66939107 is an equidigital number, since it uses as much as digits as its factorization.

66939107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 66939107 is about 8181.6322943530. The cubic root of 66939107 is about 406.0317280486.

The spelling of 66939107 in words is "sixty-six million, nine hundred thirty-nine thousand, one hundred seven".