6778509903 has 18 divisors (see below), whose sum is σ = 10762208912. Its totient is φ = 4108187160.

The previous prime is 6778509833. The next prime is 6778509919. The reversal of 6778509903 is 3099058776.

6778509903 is a `hidden beast` number, since 67 + 78 + 509 + 9 + 0 + 3 = 666.

It is not a de Polignac number, because 6778509903 - 2¹² = 6778505807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6778509903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778509953) 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 in 17 ways as a sum of consecutive naturals, for example, 3111175 + ... + 3113352.

Almost surely, 2^6778509903 is an apocalyptic number.

6778509903 is a deficient number, since it is larger than the sum of its proper divisors (3983699009).

6778509903 is a wasteful number, since it uses less digits than its factorization.

6778509903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224555 (or 6224541 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 6778509903 is about 82331.7065473563. The cubic root of 6778509903 is about 1892.5385950863.

The spelling of 6778509903 in words is "six billion, seven hundred seventy-eight million, five hundred nine thousand, nine hundred three".