66560700557943 has 12 divisors (see below), whose sum is σ = 96151984917768. Its totient is φ = 44369761551120.

The previous prime is 66560700557941. The next prime is 66560700557951. The reversal of 66560700557943 is 34975500706566.

66560700557943 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 0 + 70 + 0 + 557 + 9 + 4 + 3 = 666.

It is not a de Polignac number, because 66560700557943 - 2¹ = 66560700557941 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560700557941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336464028 + ... + 336661793.

It is an arithmetic number, because the mean of its divisors is an integer number (8012665409814).

Almost surely, 2^{66560700557943} is an apocalyptic number.

66560700557943 is a deficient number, since it is larger than the sum of its proper divisors (29591284359825).

66560700557943 is a wasteful number, since it uses less digits than its factorization.

66560700557943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673136814 (or 673136811 counting only the distinct ones).

The product of its (nonzero) digits is 142884000, while the sum is 63.

The spelling of 66560700557943 in words is "sixty-six trillion, five hundred sixty billion, seven hundred million, five hundred fifty-seven thousand, nine hundred forty-three".