6777443440 has 20 divisors (see below), whose sum is σ = 15757556184. Its totient is φ = 2710977344.

The previous prime is 6777443437. The next prime is 6777443473. The reversal of 6777443440 is 443447776.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 42358942 + ... + 42359101.

Almost surely, 2^6777443440 is an apocalyptic number.

It is an amenable number.

6777443440 is an abundant number, since it is smaller than the sum of its proper divisors (8980112744).

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

6777443440 is a wasteful number, since it uses less digits than its factorization.

6777443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84718056 (or 84718050 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 46.

The square root of 6777443440 is about 82325.2296686745. The cubic root of 6777443440 is about 1892.4393388450.

The spelling of 6777443440 in words is "six billion, seven hundred seventy-seven million, four hundred forty-three thousand, four hundred forty".