6682387778 has 16 divisors (see below), whose sum is σ = 11578041504. Its totient is φ = 2858775360.

The previous prime is 6682387771. The next prime is 6682387841. The reversal of 6682387778 is 8777832866.

It is a self number, because there is not a number n which added to its sum of digits gives 6682387778.

It is not an unprimeable number, because it can be changed into a prime (6682387771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8933300 + ... + 8934047.

It is an arithmetic number, because the mean of its divisors is an integer number (723627594).

Almost surely, 2^6682387778 is an apocalyptic number.

6682387778 is a deficient number, since it is larger than the sum of its proper divisors (4895653726).

6682387778 is a wasteful number, since it uses less digits than its factorization.

6682387778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17867377.

The product of its digits is 37933056, while the sum is 62.

The square root of 6682387778 is about 81745.8731557747. The cubic root of 6682387778 is about 1883.5503096001.

The spelling of 6682387778 in words is "six billion, six hundred eighty-two million, three hundred eighty-seven thousand, seven hundred seventy-eight".