77778068 has 12 divisors (see below), whose sum is σ = 136493280. Its totient is φ = 38779992.

The previous prime is 77778067. The next prime is 77778073. The reversal of 77778068 is 86087777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77778061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 25646 + ... + 28517.

It is an arithmetic number, because the mean of its divisors is an integer number (11374440).

Almost surely, 2^77778068 is an apocalyptic number.

It is an amenable number.

77778068 is a deficient number, since it is larger than the sum of its proper divisors (58715212).

77778068 is a wasteful number, since it uses less digits than its factorization.

77778068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54526 (or 54524 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 50.

The square root of 77778068 is about 8819.1874909200. The cubic root of 77778068 is about 426.8602525940.

The spelling of 77778068 in words is "seventy-seven million, seven hundred seventy-eight thousand, sixty-eight".