67647616 has 32 divisors (see below), whose sum is σ = 135521280. Its totient is φ = 33634560.

The previous prime is 67647533. The next prime is 67647667. The reversal of 67647616 is 61674676.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23065 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (4235040).

Almost surely, 2^67647616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67647616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67760640).

67647616 is an abundant number, since it is smaller than the sum of its proper divisors (67873664).

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

67647616 is a wasteful number, since it uses less digits than its factorization.

67647616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2960 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 67647616 is about 8224.8170800328. The cubic root of 67647616 is about 407.4592348848.

The spelling of 67647616 in words is "sixty-seven million, six hundred forty-seven thousand, six hundred sixteen".