66771011 has 2 divisors, whose sum is σ = 66771012. Its totient is φ = 66771010.

The previous prime is 66770987. The next prime is 66771031. The reversal of 66771011 is 11017766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66771011 - 2¹⁰ = 66769987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66771031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33385505 + 33385506.

It is an arithmetic number, because the mean of its divisors is an integer number (33385506).

Almost surely, 2^66771011 is an apocalyptic number.

66771011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66771011 is an equidigital number, since it uses as much as digits as its factorization.

66771011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 66771011 is about 8171.3530703305. The cubic root of 66771011 is about 405.6915705358.

Adding to 66771011 its reverse (11017766), we get a palindrome (77788777).

The spelling of 66771011 in words is "sixty-six million, seven hundred seventy-one thousand, eleven".