6779956644 has 72 divisors (see below), whose sum is σ = 17452373120. Its totient is φ = 2218881600.

The previous prime is 6779956619. The next prime is 6779956657. The reversal of 6779956644 is 4466599776.

6779956644 is a `hidden beast` number, since 67 + 7 + 9 + 9 + 566 + 4 + 4 = 666.

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 23 ways as a sum of consecutive naturals, for example, 508179 + ... + 521349.

Almost surely, 2^6779956644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6779956644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8726186560).

6779956644 is an abundant number, since it is smaller than the sum of its proper divisors (10672416476).

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

6779956644 is a wasteful number, since it uses less digits than its factorization.

6779956644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13441 (or 13436 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The square root of 6779956644 is about 82340.4921287212. The cubic root of 6779956644 is about 1892.6732273506.

The spelling of 6779956644 in words is "six billion, seven hundred seventy-nine million, nine hundred fifty-six thousand, six hundred forty-four".