6779848985 has 36 divisors (see below), whose sum is σ = 10199115108. Its totient is φ = 4288479552.

The previous prime is 6779848981. The next prime is 6779848993. The reversal of 6779848985 is 5898489776.

It can be written as a sum of positive squares in 2 ways, for example, as 1668885904 + 5110963081 = 40852^2 + 71491^2 .

It is not a de Polignac number, because 6779848985 - 2² = 6779848981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779848981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4646186 + ... + 4647644.

It is an arithmetic number, because the mean of its divisors is an integer number (283308753).

Almost surely, 2^6779848985 is an apocalyptic number.

6779848985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6779848985 is a deficient number, since it is larger than the sum of its proper divisors (3419266123).

6779848985 is an equidigital number, since it uses as much as digits as its factorization.

6779848985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950 (or 1484 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 71.

The square root of 6779848985 is about 82339.8383833731. The cubic root of 6779848985 is about 1892.6632093718.

The spelling of 6779848985 in words is "six billion, seven hundred seventy-nine million, eight hundred forty-eight thousand, nine hundred eighty-five".