6711921856 has 28 divisors (see below), whose sum is σ = 13602358368. Its totient is φ = 3284556032.

The previous prime is 6711921761. The next prime is 6711921857. The reversal of 6711921856 is 6581291176.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6711921857) 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 3 ways as a sum of consecutive naturals, for example, 1112671 + ... + 1118686.

Almost surely, 2^6711921856 is an apocalyptic number.

It is an amenable number.

6711921856 is an abundant number, since it is smaller than the sum of its proper divisors (6890436512).

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

6711921856 is a wasteful number, since it uses less digits than its factorization.

6711921856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231416 (or 2231406 counting only the distinct ones).

The product of its digits is 181440, while the sum is 46.

The square root of 6711921856 is about 81926.3196781108. The cubic root of 6711921856 is about 1886.3211339451.

The spelling of 6711921856 in words is "six billion, seven hundred eleven million, nine hundred twenty-one thousand, eight hundred fifty-six".