6879377778 has 64 divisors (see below), whose sum is σ = 16966935552. Its totient is φ = 1810797120.

The previous prime is 6879377759. The next prime is 6879377789. The reversal of 6879377778 is 8777739786.

It is a super-2 number, since 2×6879377778² = 94651677224880434568, which contains 22 as substring.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 273513 + ... + 297603.

It is an arithmetic number, because the mean of its divisors is an integer number (265108368).

Almost surely, 2^6879377778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6879377778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8483467776).

6879377778 is an abundant number, since it is smaller than the sum of its proper divisors (10087557774).

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

6879377778 is a wasteful number, since it uses less digits than its factorization.

6879377778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24639.

The product of its digits is 174254976, while the sum is 69.

The square root of 6879377778 is about 82942.0145523365. The cubic root of 6879377778 is about 1901.8797442990.

The spelling of 6879377778 in words is "six billion, eight hundred seventy-nine million, three hundred seventy-seven thousand, seven hundred seventy-eight".