66807011 has 2 divisors, whose sum is σ = 66807012. Its totient is φ = 66807010.

The previous prime is 66806989. The next prime is 66807023. The reversal of 66807011 is 11070866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66807011 - 2⁶ = 66806947 is a prime.

It is not a weakly prime, because it can be changed into another prime (66807071) 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, 33403505 + 33403506.

It is an arithmetic number, because the mean of its divisors is an integer number (33403506).

Almost surely, 2^66807011 is an apocalyptic number.

66807011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66807011 is an equidigital number, since it uses as much as digits as its factorization.

66807011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 66807011 is about 8173.5555910509. Note that the first 4 decimals coincide. The cubic root of 66807011 is about 405.7644678024.

Adding to 66807011 its reverse (11070866), we get a palindrome (77877877).

The spelling of 66807011 in words is "sixty-six million, eight hundred seven thousand, eleven".