76647768 has 32 divisors (see below), whose sum is σ = 191914800. Its totient is φ = 25509888.

The previous prime is 76647763. The next prime is 76647773. The reversal of 76647768 is 86774667.

It is an interprime number because it is at equal distance from previous prime (76647763) and next prime (76647773).

It is a self number, because there is not a number n which added to its sum of digits gives 76647768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76647763) 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 7 ways as a sum of consecutive naturals, for example, 16380 + ... + 20532.

Almost surely, 2^76647768 is an apocalyptic number.

It is an amenable number.

76647768 is an abundant number, since it is smaller than the sum of its proper divisors (115267032).

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

76647768 is a wasteful number, since it uses less digits than its factorization.

76647768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931 (or 4927 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 51.

The square root of 76647768 is about 8754.8711012784. The cubic root of 76647768 is about 424.7823900971.

The spelling of 76647768 in words is "seventy-six million, six hundred forty-seven thousand, seven hundred sixty-eight".