878765676779 has 2 divisors, whose sum is σ = 878765676780. Its totient is φ = 878765676778.

The previous prime is 878765676743. The next prime is 878765676781. The reversal of 878765676779 is 977676567878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878765676779 is a prime.

It is a super-2 number, since 2×878765676779² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 878765676781, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 878765676697 and 878765676706.

It is not a weakly prime, because it can be changed into another prime (878765678779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439382838389 + 439382838390.

It is an arithmetic number, because the mean of its divisors is an integer number (439382838390).

Almost surely, 2^878765676779 is an apocalyptic number.

878765676779 is a deficient number, since it is larger than the sum of its proper divisors (1).

878765676779 is an equidigital number, since it uses as much as digits as its factorization.

878765676779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10455298560, while the sum is 83.

The spelling of 878765676779 in words is "eight hundred seventy-eight billion, seven hundred sixty-five million, six hundred seventy-six thousand, seven hundred seventy-nine".