68740680 has 64 divisors (see below), whose sum is σ = 206769600. Its totient is φ = 18282240.

The previous prime is 68740627. The next prime is 68740687. The reversal of 68740680 is 8604786.

It is a Cunningham number, because it is equal to 8291²-1.

It is not an unprimeable number, because it can be changed into a prime (68740687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82506 + ... + 83334.

It is an arithmetic number, because the mean of its divisors is an integer number (3230775).

Almost surely, 2^68740680 is an apocalyptic number.

68740680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68740680 is an abundant number, since it is smaller than the sum of its proper divisors (138028920).

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

68740680 is a wasteful number, since it uses less digits than its factorization.

68740680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 68740680 is about 8290.9999396936. Note that the first 4 decimals coincide. The cubic root of 68740680 is about 409.6421227686.

The spelling of 68740680 in words is "sixty-eight million, seven hundred forty thousand, six hundred eighty".