6778389964 has 12 divisors (see below), whose sum is σ = 11904100264. Its totient is φ = 3377218464.

The previous prime is 6778389949. The next prime is 6778389977. The reversal of 6778389964 is 4699838776.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6778389964.

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, 2992857 + ... + 2995120.

Almost surely, 2^6778389964 is an apocalyptic number.

It is an amenable number.

6778389964 is a deficient number, since it is larger than the sum of its proper divisors (5125710300).

6778389964 is a wasteful number, since it uses less digits than its factorization.

6778389964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988264 (or 5988262 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 67.

The square root of 6778389964 is about 82330.9781552485. The cubic root of 6778389964 is about 1892.5274328236.

The spelling of 6778389964 in words is "six billion, seven hundred seventy-eight million, three hundred eighty-nine thousand, nine hundred sixty-four".