67568666616 has 512 divisors, whose sum is σ = 222393600000. Its totient is φ = 18781839360.

The previous prime is 67568666579. The next prime is 67568666639. The reversal of 67568666616 is 61666686576.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 453480910 + ... + 453481058.

It is an arithmetic number, because the mean of its divisors is an integer number (434362500).

Almost surely, 2^67568666616 is an apocalyptic number.

67568666616 is a gapful number since it is divisible by the number (66) 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 67568666616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111196800000).

67568666616 is an abundant number, since it is smaller than the sum of its proper divisors (154824933384).

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

67568666616 is a wasteful number, since it uses less digits than its factorization.

67568666616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 394 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 67568666616 in words is "sixty-seven billion, five hundred sixty-eight million, six hundred sixty-six thousand, six hundred sixteen".