66008005767945 has 12 divisors (see below), whose sum is σ = 114413876664516. Its totient is φ = 35204269742880.

The previous prime is 66008005767943. The next prime is 66008005767959. The reversal of 66008005767945 is 54976750080066.

66008005767945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6632535787641 + 59375469980304 = 2575371^2 + 7705548^2 .

It is not a de Polignac number, because 66008005767945 - 2¹ = 66008005767943 is a prime.

It is a super-2 number, since 2×66008005767945² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66008005767943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733422286266 + ... + 733422286355.

It is an arithmetic number, because the mean of its divisors is an integer number (9534489722043).

Almost surely, 2^{66008005767945} is an apocalyptic number.

It is an amenable number.

66008005767945 is a deficient number, since it is larger than the sum of its proper divisors (48405870896571).

66008005767945 is a wasteful number, since it uses less digits than its factorization.

66008005767945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466844572632 (or 1466844572629 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 66008005767945 in words is "sixty-six trillion, eight billion, five million, seven hundred sixty-seven thousand, nine hundred forty-five".