677553996869 has 2 divisors, whose sum is σ = 677553996870. Its totient is φ = 677553996868.

The previous prime is 677553996857. The next prime is 677553996877. The reversal of 677553996869 is 968699355776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399851346244 + 277702650625 = 632338^2 + 526975^2 .

It is a cyclic number.

It is not a de Polignac number, because 677553996869 - 2⁴ = 677553996853 is a prime.

It is a super-2 number, since 2×677553996869² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 677553996793 and 677553996802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677553996829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338776998434 + 338776998435.

It is an arithmetic number, because the mean of its divisors is an integer number (338776998435).

Almost surely, 2^677553996869 is an apocalyptic number.

It is an amenable number.

677553996869 is a deficient number, since it is larger than the sum of its proper divisors (1).

677553996869 is an equidigital number, since it uses as much as digits as its factorization.

677553996869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4629441600, while the sum is 80.

The spelling of 677553996869 in words is "six hundred seventy-seven billion, five hundred fifty-three million, nine hundred ninety-six thousand, eight hundred sixty-nine".