67657756716 has 72 divisors (see below), whose sum is σ = 196390958400. Its totient is φ = 19423277280.

The previous prime is 67657756669. The next prime is 67657756739. The reversal of 67657756716 is 61765775676.

It is a happy number.

67657756716 is a `hidden beast` number, since 6 + 7 + 6 + 57 + 7 + 567 + 16 = 666.

67657756716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4488606 + ... + 4503653.

It is an arithmetic number, because the mean of its divisors is an integer number (2727652200).

Almost surely, 2^67657756716 is an apocalyptic number.

67657756716 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

67657756716 is an abundant number, since it is smaller than the sum of its proper divisors (128733201684).

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

67657756716 is a wasteful number, since it uses less digits than its factorization.

67657756716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8992299 (or 8992294 counting only the distinct ones).

The product of its digits is 77792400, while the sum is 63.

The spelling of 67657756716 in words is "sixty-seven billion, six hundred fifty-seven million, seven hundred fifty-six thousand, seven hundred sixteen".