6766478913773 has 2 divisors, whose sum is σ = 6766478913774. Its totient is φ = 6766478913772.

The previous prime is 6766478913743. The next prime is 6766478913791. The reversal of 6766478913773 is 3773198746676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6022886580649 + 743592333124 = 2454157^2 + 862318^2 .

It is a cyclic number.

It is not a de Polignac number, because 6766478913773 - 2¹⁸ = 6766478651629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6766478913773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6766478913743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383239456886 + 3383239456887.

It is an arithmetic number, because the mean of its divisors is an integer number (3383239456887).

Almost surely, 2^{6766478913773} is an apocalyptic number.

It is an amenable number.

6766478913773 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766478913773 is an equidigital number, since it uses as much as digits as its factorization.

6766478913773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344252672, while the sum is 74.

The spelling of 6766478913773 in words is "six trillion, seven hundred sixty-six billion, four hundred seventy-eight million, nine hundred thirteen thousand, seven hundred seventy-three".