6777780560 has 20 divisors (see below), whose sum is σ = 15758339988. Its totient is φ = 2711112192.

The previous prime is 6777780551. The next prime is 6777780593. The reversal of 6777780560 is 650877776.

It can be written as a sum of positive squares in 2 ways, for example, as 752295184 + 6025485376 = 27428^2 + 77624^2 .

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, 42361049 + ... + 42361208.

Almost surely, 2^6777780560 is an apocalyptic number.

It is an amenable number.

6777780560 is an abundant number, since it is smaller than the sum of its proper divisors (8980559428).

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

6777780560 is a wasteful number, since it uses less digits than its factorization.

6777780560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84722270 (or 84722264 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 53.

The square root of 6777780560 is about 82327.2771321875. The cubic root of 6777780560 is about 1892.4707158963.

The spelling of 6777780560 in words is "six billion, seven hundred seventy-seven million, seven hundred eighty thousand, five hundred sixty".