6777438078 has 8 divisors (see below), whose sum is σ = 13554876168. Its totient is φ = 2259146024.

The previous prime is 6777438071. The next prime is 6777438089. The reversal of 6777438078 is 8708347776.

It is a sphenic number, since it is the product of 3 distinct primes.

6777438078 is an admirable number.

It is a super-2 number, since 2×6777438078² = 91867333802248668168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777438071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564786501 + ... + 564786512.

It is an arithmetic number, because the mean of its divisors is an integer number (1694359521).

Almost surely, 2^6777438078 is an apocalyptic number.

6777438078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6777438078 is a wasteful number, since it uses less digits than its factorization.

6777438078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129573018.

The product of its (nonzero) digits is 11063808, while the sum is 57.

The square root of 6777438078 is about 82325.1971027097. The cubic root of 6777438078 is about 1892.4388397747.

The spelling of 6777438078 in words is "six billion, seven hundred seventy-seven million, four hundred thirty-eight thousand, seventy-eight".