6778751986 has 8 divisors (see below), whose sum is σ = 10168614144. Its totient is φ = 3389213940.

The previous prime is 6778751971. The next prime is 6778752007. The reversal of 6778751986 is 6891578776.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19350 + ... + 118033.

It is an arithmetic number, because the mean of its divisors is an integer number (1271076768).

Almost surely, 2^6778751986 is an apocalyptic number.

6778751986 is a deficient number, since it is larger than the sum of its proper divisors (3389862158).

6778751986 is a wasteful number, since it uses less digits than its factorization.

6778751986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162056.

The product of its digits is 35562240, while the sum is 64.

The square root of 6778751986 is about 82333.1767029549. The cubic root of 6778751986 is about 1892.5611244216.

The spelling of 6778751986 in words is "six billion, seven hundred seventy-eight million, seven hundred fifty-one thousand, nine hundred eighty-six".