83566666666543 has 2 divisors, whose sum is σ = 83566666666544. Its totient is φ = 83566666666542.

The previous prime is 83566666666519. The next prime is 83566666666621. The reversal of 83566666666543 is 34566666666538.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83566666666543 - 2²¹ = 83566664569391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83566666666543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83566666666643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41783333333271 + 41783333333272.

It is an arithmetic number, because the mean of its divisors is an integer number (41783333333272).

Almost surely, 2^{83566666666543} is an apocalyptic number.

83566666666543 is a deficient number, since it is larger than the sum of its proper divisors (1).

83566666666543 is an equidigital number, since it uses as much as digits as its factorization.

83566666666543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12093235200, while the sum is 76.

The spelling of 83566666666543 in words is "eighty-three trillion, five hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred forty-three".