68685578 has 16 divisors (see below), whose sum is σ = 113661576. Its totient is φ = 30927360.

The previous prime is 68685517. The next prime is 68685611. The reversal of 68685578 is 87558686.

It can be written as a sum of positive squares in 4 ways, for example, as 26863489 + 41822089 = 5183^2 + 6467^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31151 + ... + 33282.

Almost surely, 2^68685578 is an apocalyptic number.

68685578 is a deficient number, since it is larger than the sum of its proper divisors (44975998).

68685578 is a wasteful number, since it uses less digits than its factorization.

68685578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64489.

The product of its digits is 3225600, while the sum is 53.

The square root of 68685578 is about 8287.6762726352. The cubic root of 68685578 is about 409.5326381852.

The spelling of 68685578 in words is "sixty-eight million, six hundred eighty-five thousand, five hundred seventy-eight".