65783943773 has 2 divisors, whose sum is σ = 65783943774. Its totient is φ = 65783943772.

The previous prime is 65783943763. The next prime is 65783943809. The reversal of 65783943773 is 37734938756.

65783943773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36565853284 + 29218090489 = 191222^2 + 170933^2 .

It is a cyclic number.

It is not a de Polignac number, because 65783943773 - 2¹⁴ = 65783927389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65783943703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32891971886 + 32891971887.

It is an arithmetic number, because the mean of its divisors is an integer number (32891971887).

Almost surely, 2^65783943773 is an apocalyptic number.

It is an amenable number.

65783943773 is a deficient number, since it is larger than the sum of its proper divisors (1).

65783943773 is an equidigital number, since it uses as much as digits as its factorization.

65783943773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80015040, while the sum is 62.

The spelling of 65783943773 in words is "sixty-five billion, seven hundred eighty-three million, nine hundred forty-three thousand, seven hundred seventy-three".