77768764 has 6 divisors (see below), whose sum is σ = 136095344. Its totient is φ = 38884380.

The previous prime is 77768741. The next prime is 77768809. The reversal of 77768764 is 46786777.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 9721092 + ... + 9721099.

Almost surely, 2^77768764 is an apocalyptic number.

It is an amenable number.

77768764 is a deficient number, since it is larger than the sum of its proper divisors (58326580).

77768764 is a wasteful number, since it uses less digits than its factorization.

77768764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442195 (or 19442193 counting only the distinct ones).

The product of its digits is 2765952, while the sum is 52.

The square root of 77768764 is about 8818.6599889099. The cubic root of 77768764 is about 426.8432312311.

The spelling of 77768764 in words is "seventy-seven million, seven hundred sixty-eight thousand, seven hundred sixty-four".