7878676779 has 12 divisors (see below), whose sum is σ = 11384427600. Its totient is φ = 5250551184.

The previous prime is 7878676777. The next prime is 7878676789. The reversal of 7878676779 is 9776768787.

It is not a de Polignac number, because 7878676779 - 2¹ = 7878676777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7878676777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131839 + ... + 182040.

It is an arithmetic number, because the mean of its divisors is an integer number (948702300).

Almost surely, 2^7878676779 is an apocalyptic number.

7878676779 is a deficient number, since it is larger than the sum of its proper divisors (3505750821).

7878676779 is a wasteful number, since it uses less digits than its factorization.

7878676779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316674 (or 316671 counting only the distinct ones).

The product of its digits is 348509952, while the sum is 72.

The square root of 7878676779 is about 88761.9106317569. The cubic root of 7878676779 is about 1989.8381878143.

The spelling of 7878676779 in words is "seven billion, eight hundred seventy-eight million, six hundred seventy-six thousand, seven hundred seventy-nine".