66801111730783 has 2 divisors, whose sum is σ = 66801111730784. Its totient is φ = 66801111730782.

The previous prime is 66801111730741. The next prime is 66801111730799. The reversal of 66801111730783 is 38703711110866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66801111730783 - 2⁹ = 66801111730271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66801111730783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66801111730733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33400555865391 + 33400555865392.

It is an arithmetic number, because the mean of its divisors is an integer number (33400555865392).

Almost surely, 2^{66801111730783} is an apocalyptic number.

66801111730783 is a deficient number, since it is larger than the sum of its proper divisors (1).

66801111730783 is an equidigital number, since it uses as much as digits as its factorization.

66801111730783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 66801111730783 in words is "sixty-six trillion, eight hundred one billion, one hundred eleven million, seven hundred thirty thousand, seven hundred eighty-three".