68691616 has 96 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 27599616.

The previous prime is 68691589. The next prime is 68691643. The reversal of 68691616 is 61619686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68691589) and next prime (68691643).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345085 + ... + 345283.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^68691616 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 68691616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82252800).

68691616 is an abundant number, since it is smaller than the sum of its proper divisors (95813984).

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

68691616 is a wasteful number, since it uses less digits than its factorization.

68691616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 298 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 68691616 is about 8288.0405404414. The cubic root of 68691616 is about 409.5446382085.

The spelling of 68691616 in words is "sixty-eight million, six hundred ninety-one thousand, six hundred sixteen".