68663616 has 112 divisors (see below), whose sum is σ = 212238336. Its totient is φ = 19183104.

The previous prime is 68663599. The next prime is 68663627. The reversal of 68663616 is 61636686.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 62625 + ... + 63711.

Almost surely, 2^68663616 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 68663616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106119168).

68663616 is an abundant number, since it is smaller than the sum of its proper divisors (143574720).

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

68663616 is a wasteful number, since it uses less digits than its factorization.

68663616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156 (or 1146 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 68663616 is about 8286.3511873442. The cubic root of 68663616 is about 409.4889846029.

The spelling of 68663616 in words is "sixty-eight million, six hundred sixty-three thousand, six hundred sixteen".