66780000011 has 2 divisors, whose sum is σ = 66780000012. Its totient is φ = 66780000010.

The previous prime is 66779999999. The next prime is 66780000113. The reversal of 66780000011 is 11000008766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66780000011 - 2¹⁸ = 66779737867 is a prime.

It is not a weakly prime, because it can be changed into another prime (66780002011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33390000005 + 33390000006.

It is an arithmetic number, because the mean of its divisors is an integer number (33390000006).

Almost surely, 2^66780000011 is an apocalyptic number.

66780000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66780000011 is an equidigital number, since it uses as much as digits as its factorization.

66780000011 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.

Adding to 66780000011 its reverse (11000008766), we get a palindrome (77780008777).

The spelling of 66780000011 in words is "sixty-six billion, seven hundred eighty million, eleven", and thus it is an aban number.