6805778664 has 16 divisors (see below), whose sum is σ = 17014446720. Its totient is φ = 2268592880.

The previous prime is 6805778621. The next prime is 6805778747. The reversal of 6805778664 is 4668775086.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141787032 + ... + 141787079.

It is an arithmetic number, because the mean of its divisors is an integer number (1063402920).

Almost surely, 2^6805778664 is an apocalyptic number.

It is an amenable number.

6805778664 is an abundant number, since it is smaller than the sum of its proper divisors (10208668056).

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

6805778664 is a wasteful number, since it uses less digits than its factorization.

6805778664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283574120 (or 283574116 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The square root of 6805778664 is about 82497.1433687252. The cubic root of 6805778664 is about 1895.0729836855.

The spelling of 6805778664 in words is "six billion, eight hundred five million, seven hundred seventy-eight thousand, six hundred sixty-four".