677855558773 has 2 divisors, whose sum is σ = 677855558774. Its totient is φ = 677855558772.

The previous prime is 677855558771. The next prime is 677855558801. The reversal of 677855558773 is 377855558776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660892580209 + 16962978564 = 812953^2 + 130242^2 .

It is a cyclic number.

It is not a de Polignac number, because 677855558773 - 2¹ = 677855558771 is a prime.

Together with 677855558771, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 677855558696 and 677855558705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677855558771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338927779386 + 338927779387.

It is an arithmetic number, because the mean of its divisors is an integer number (338927779387).

Almost surely, 2^677855558773 is an apocalyptic number.

It is an amenable number.

677855558773 is a deficient number, since it is larger than the sum of its proper divisors (1).

677855558773 is an equidigital number, since it uses as much as digits as its factorization.

677855558773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728720000, while the sum is 73.

The spelling of 677855558773 in words is "six hundred seventy-seven billion, eight hundred fifty-five million, five hundred fifty-eight thousand, seven hundred seventy-three".