77684668 has 24 divisors (see below), whose sum is σ = 140230944. Its totient is φ = 37632000.

The previous prime is 77684653. The next prime is 77684669. The reversal of 77684668 is 86648677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77684669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23196 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (5842956).

Almost surely, 2^77684668 is an apocalyptic number.

It is an amenable number.

77684668 is a deficient number, since it is larger than the sum of its proper divisors (62546276).

77684668 is a wasteful number, since it uses less digits than its factorization.

77684668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3331 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The square root of 77684668 is about 8813.8906278669. The cubic root of 77684668 is about 426.6893187301.

The spelling of 77684668 in words is "seventy-seven million, six hundred eighty-four thousand, six hundred sixty-eight".