6779899854 has 128 divisors (see below), whose sum is σ = 18582036480. Its totient is φ = 1784374272.

The previous prime is 6779899853. The next prime is 6779899859. The reversal of 6779899854 is 4589989776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779899853) 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 63 ways as a sum of consecutive naturals, for example, 2981662 + ... + 2983934.

It is an arithmetic number, because the mean of its divisors is an integer number (145172160).

Almost surely, 2^6779899854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6779899854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9291018240).

6779899854 is an abundant number, since it is smaller than the sum of its proper divisors (11802136626).

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

6779899854 is a wasteful number, since it uses less digits than its factorization.

6779899854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2905 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The square root of 6779899854 is about 82340.1472794408. The cubic root of 6779899854 is about 1892.6679428914.

The spelling of 6779899854 in words is "six billion, seven hundred seventy-nine million, eight hundred ninety-nine thousand, eight hundred fifty-four".