66523542803983 has 2 divisors, whose sum is σ = 66523542803984. Its totient is φ = 66523542803982.

The previous prime is 66523542803969. The next prime is 66523542804049. The reversal of 66523542803983 is 38930824532566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66523542803983 - 2¹⁷ = 66523542672911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66523542803083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33261771401991 + 33261771401992.

It is an arithmetic number, because the mean of its divisors is an integer number (33261771401992).

Almost surely, 2^{66523542803983} is an apocalyptic number.

66523542803983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66523542803983 is an equidigital number, since it uses as much as digits as its factorization.

66523542803983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 223948800, while the sum is 64.

The spelling of 66523542803983 in words is "sixty-six trillion, five hundred twenty-three billion, five hundred forty-two million, eight hundred three thousand, nine hundred eighty-three".