68657560 has 64 divisors (see below), whose sum is σ = 168894720. Its totient is φ = 25006080.

The previous prime is 68657539. The next prime is 68657569. The reversal of 68657560 is 6575686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68657569) by changing a digit.

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, 19452 + ... + 22708.

It is an arithmetic number, because the mean of its divisors is an integer number (2638980).

Almost surely, 2^68657560 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 68657560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84447360).

68657560 is an abundant number, since it is smaller than the sum of its proper divisors (100237160).

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

68657560 is a wasteful number, since it uses less digits than its factorization.

68657560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316 (or 3312 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 68657560 is about 8285.9857590995. The cubic root of 68657560 is about 409.4769455331.

The spelling of 68657560 in words is "sixty-eight million, six hundred fifty-seven thousand, five hundred sixty".