66563045344641 has 16 divisors (see below), whose sum is σ = 92624341576320. Its totient is φ = 42439176637440.

The previous prime is 66563045344567. The next prime is 66563045344769. The reversal of 66563045344641 is 14644354036566.

It is not a de Polignac number, because 66563045344641 - 2¹³ = 66563045336449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66563045344541) 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, 77105056 + ... + 77963553.

It is an arithmetic number, because the mean of its divisors is an integer number (5789021348520).

Almost surely, 2^{66563045344641} is an apocalyptic number.

It is an amenable number.

66563045344641 is a deficient number, since it is larger than the sum of its proper divisors (26061296231679).

66563045344641 is a wasteful number, since it uses less digits than its factorization.

66563045344641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155074856.

The product of its (nonzero) digits is 74649600, while the sum is 57.

The spelling of 66563045344641 in words is "sixty-six trillion, five hundred sixty-three billion, forty-five million, three hundred forty-four thousand, six hundred forty-one".