6778517345 has 16 divisors (see below), whose sum is σ = 8202600000. Its totient is φ = 5377351488.

The previous prime is 6778517329. The next prime is 6778517351. The reversal of 6778517345 is 5437158776.

It is a cyclic number.

It is not a de Polignac number, because 6778517345 - 2⁴ = 6778517329 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 453806 + ... + 468504.

It is an arithmetic number, because the mean of its divisors is an integer number (512662500).

Almost surely, 2^6778517345 is an apocalyptic number.

It is an amenable number.

6778517345 is a deficient number, since it is larger than the sum of its proper divisors (1424082655).

6778517345 is a wasteful number, since it uses less digits than its factorization.

6778517345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15472.

The product of its digits is 4939200, while the sum is 53.

The square root of 6778517345 is about 82331.7517425689. The cubic root of 6778517345 is about 1892.5392876804.

The spelling of 6778517345 in words is "six billion, seven hundred seventy-eight million, five hundred seventeen thousand, three hundred forty-five".