6778450681 has 16 divisors (see below), whose sum is σ = 7535251584. Its totient is φ = 6064844544.

The previous prime is 6778450631. The next prime is 6778450687. The reversal of 6778450681 is 1860548776.

It is a cyclic number.

It is not a de Polignac number, because 6778450681 - 2¹⁵ = 6778417913 is a prime.

It is a super-2 number, since 2×6778450681² = 91894787269498727522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778450687) 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 15 ways as a sum of consecutive naturals, for example, 10555 + ... + 116911.

It is an arithmetic number, because the mean of its divisors is an integer number (470953224).

Almost surely, 2^6778450681 is an apocalyptic number.

It is an amenable number.

6778450681 is a deficient number, since it is larger than the sum of its proper divisors (756800903).

6778450681 is a wasteful number, since it uses less digits than its factorization.

6778450681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106560.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 6778450681 is about 82331.3468916913. The cubic root of 6778450681 is about 1892.5330835384.

The spelling of 6778450681 in words is "six billion, seven hundred seventy-eight million, four hundred fifty thousand, six hundred eighty-one".