66544646011 has 2 divisors, whose sum is σ = 66544646012. Its totient is φ = 66544646010.

The previous prime is 66544645967. The next prime is 66544646041. The reversal of 66544646011 is 11064644566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66544646011 - 2⁷ = 66544645883 is a prime.

It is not a weakly prime, because it can be changed into another prime (66544646041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33272323005 + 33272323006.

It is an arithmetic number, because the mean of its divisors is an integer number (33272323006).

Almost surely, 2^66544646011 is an apocalyptic number.

66544646011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66544646011 is an equidigital number, since it uses as much as digits as its factorization.

66544646011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 66544646011 in words is "sixty-six billion, five hundred forty-four million, six hundred forty-six thousand, eleven".