6789878957 has 2 divisors, whose sum is σ = 6789878958. Its totient is φ = 6789878956.

The previous prime is 6789878941. The next prime is 6789878987. The reversal of 6789878957 is 7598789876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6653012356 + 136866601 = 81566^2 + 11699^2 .

It is a cyclic number.

It is not a de Polignac number, because 6789878957 - 2⁴ = 6789878941 is a prime.

It is a super-2 number, since 2×6789878957² = 92204912501422815698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6789878987) 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 as a sum of consecutive naturals, namely, 3394939478 + 3394939479.

It is an arithmetic number, because the mean of its divisors is an integer number (3394939479).

Almost surely, 2^6789878957 is an apocalyptic number.

It is an amenable number.

6789878957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6789878957 is an equidigital number, since it uses as much as digits as its factorization.

6789878957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 426746880, while the sum is 74.

The square root of 6789878957 is about 82400.7218232947. The cubic root of 6789878957 is about 1893.5960721108.

The spelling of 6789878957 in words is "six billion, seven hundred eighty-nine million, eight hundred seventy-eight thousand, nine hundred fifty-seven".