66744101011 has 16 divisors (see below), whose sum is σ = 76494456000. Its totient is φ = 57047851008.

The previous prime is 66744101009. The next prime is 66744101029. The reversal of 66744101011 is 11010144766.

It is a cyclic number.

It is not a de Polignac number, because 66744101011 - 2¹ = 66744101009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66744101111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3688915 + ... + 3706963.

It is an arithmetic number, because the mean of its divisors is an integer number (4780903500).

Almost surely, 2^66744101011 is an apocalyptic number.

66744101011 is a deficient number, since it is larger than the sum of its proper divisors (9750354989).

66744101011 is a wasteful number, since it uses less digits than its factorization.

66744101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19518.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 66744101011 its reverse (11010144766), we get a palindrome (77754245777).

The spelling of 66744101011 in words is "sixty-six billion, seven hundred forty-four million, one hundred one thousand, eleven".