66560043713 has 4 divisors (see below), whose sum is σ = 70475340420. Its totient is φ = 62644747008.

The previous prime is 66560043691. The next prime is 66560043731. The reversal of 66560043713 is 31734006566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57040724224 + 9519319489 = 238832^2 + 97567^2 .

It is a cyclic number.

It is not a de Polignac number, because 66560043713 - 2⁸ = 66560043457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66560043793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957648328 + ... + 1957648361.

It is an arithmetic number, because the mean of its divisors is an integer number (17618835105).

Almost surely, 2^66560043713 is an apocalyptic number.

It is an amenable number.

66560043713 is a deficient number, since it is larger than the sum of its proper divisors (3915296707).

66560043713 is a wasteful number, since it uses less digits than its factorization.

66560043713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915296706.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 66560043713 in words is "sixty-six billion, five hundred sixty million, forty-three thousand, seven hundred thirteen".