77678064 has 60 divisors (see below), whose sum is σ = 224416192. Its totient is φ = 25056000.

The previous prime is 77678063. The next prime is 77678089. The reversal of 77678064 is 46087677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77678063) 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 11 ways as a sum of consecutive naturals, for example, 4237 + ... + 13164.

Almost surely, 2^77678064 is an apocalyptic number.

It is an amenable number.

77678064 is an abundant number, since it is smaller than the sum of its proper divisors (146738128).

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

77678064 is a wasteful number, since it uses less digits than its factorization.

77678064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17446 (or 17437 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 77678064 is about 8813.5159839873. The cubic root of 77678064 is about 426.6772273862.

The spelling of 77678064 in words is "seventy-seven million, six hundred seventy-eight thousand, sixty-four".