6878778785 has 8 divisors (see below), whose sum is σ = 8256341760. Its totient is φ = 5501818224.

The previous prime is 6878778737. The next prime is 6878778793. The reversal of 6878778785 is 5878778786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6878778785 - 2⁶ = 6878778721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125087 + ... + 171476.

It is an arithmetic number, because the mean of its divisors is an integer number (1032042720).

Almost surely, 2^6878778785 is an apocalyptic number.

It is an amenable number.

6878778785 is a deficient number, since it is larger than the sum of its proper divisors (1377562975).

6878778785 is a wasteful number, since it uses less digits than its factorization.

6878778785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301207.

The product of its digits is 295034880, while the sum is 71.

The square root of 6878778785 is about 82938.4035595091. The cubic root of 6878778785 is about 1901.8245432931.

Subtracting from 6878778785 its reverse (5878778786), we obtain a palindrome (999999999).

The spelling of 6878778785 in words is "six billion, eight hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred eighty-five".