67691680560 has 800 divisors, whose sum is σ = 281527373952. Its totient is φ = 14750760960.

The previous prime is 67691680531. The next prime is 67691680561. The reversal of 67691680560 is 6508619676.

67691680560 is a `hidden beast` number, since 6 + 7 + 69 + 16 + 8 + 0 + 560 = 666.

67691680560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 67691680497 and 67691680506.

It is not an unprimeable number, because it can be changed into a prime (67691680561) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 88950580 + ... + 88951340.

Almost surely, 2^67691680560 is an apocalyptic number.

67691680560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67691680560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140763686976).

67691680560 is an abundant number, since it is smaller than the sum of its proper divisors (213835693392).

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

67691680560 is a wasteful number, since it uses less digits than its factorization.

67691680560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 67691680560 in words is "sixty-seven billion, six hundred ninety-one million, six hundred eighty thousand, five hundred sixty".