677905410817 has 4 divisors (see below), whose sum is σ = 678674884356. Its totient is φ = 677135937280.

The previous prime is 677905410811. The next prime is 677905410901. The reversal of 677905410817 is 718014509776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123291574641 + 554613836176 = 351129^2 + 744724^2 .

It is a cyclic number.

It is not a de Polignac number, because 677905410817 - 2³⁵ = 643545672449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677905410811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384735448 + ... + 384737209.

It is an arithmetic number, because the mean of its divisors is an integer number (169668721089).

Almost surely, 2^677905410817 is an apocalyptic number.

It is an amenable number.

677905410817 is a deficient number, since it is larger than the sum of its proper divisors (769473539).

677905410817 is an equidigital number, since it uses as much as digits as its factorization.

677905410817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769473538.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 677905410817 in words is "six hundred seventy-seven billion, nine hundred five million, four hundred ten thousand, eight hundred seventeen".