77755568 has 30 divisors (see below), whose sum is σ = 165596172. Its totient is φ = 35342560.

The previous prime is 77755553. The next prime is 77755597. The reversal of 77755568 is 86555777.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18146 + ... + 22017.

Almost surely, 2^77755568 is an apocalyptic number.

It is an amenable number.

77755568 is an abundant number, since it is smaller than the sum of its proper divisors (87840604).

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

77755568 is a wasteful number, since it uses less digits than its factorization.

77755568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40193 (or 40176 counting only the distinct ones).

The product of its digits is 2058000, while the sum is 50.

The square root of 77755568 is about 8817.9117709353. The cubic root of 77755568 is about 426.8190872535.

The spelling of 77755568 in words is "seventy-seven million, seven hundred fifty-five thousand, five hundred sixty-eight".