7878668783 has 2 divisors, whose sum is σ = 7878668784. Its totient is φ = 7878668782.

The previous prime is 7878668713. The next prime is 7878668789. The reversal of 7878668783 is 3878668787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7878668783 - 2¹⁰ = 7878667759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7878668789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939334391 + 3939334392.

It is an arithmetic number, because the mean of its divisors is an integer number (3939334392).

Almost surely, 2^7878668783 is an apocalyptic number.

7878668783 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878668783 is an equidigital number, since it uses as much as digits as its factorization.

7878668783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151732224, while the sum is 68.

The square root of 7878668783 is about 88761.8655899030. The cubic root of 7878668783 is about 1989.8375146577.

The spelling of 7878668783 in words is "seven billion, eight hundred seventy-eight million, six hundred sixty-eight thousand, seven hundred eighty-three".