68881705 has 24 divisors (see below), whose sum is σ = 89145432. Its totient is φ = 51075072.

The previous prime is 68881651. The next prime is 68881717. The reversal of 68881705 is 50718886.

It can be written as a sum of positive squares in 12 ways, for example, as 5089536 + 63792169 = 2256^2 + 7987^2 .

It is not a de Polignac number, because 68881705 - 2⁷ = 68881577 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 105159 + ... + 105811.

It is an arithmetic number, because the mean of its divisors is an integer number (3714393).

Almost surely, 2^68881705 is an apocalyptic number.

It is an amenable number.

68881705 is a deficient number, since it is larger than the sum of its proper divisors (20263727).

68881705 is a wasteful number, since it uses less digits than its factorization.

68881705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 68881705 is about 8299.5002861618. The cubic root of 68881705 is about 409.9220652978.

It can be divided in two parts, 6888170 and 5, that multiplied together give a triangular number (34440850 = T₈₂₉₉).

The spelling of 68881705 in words is "sixty-eight million, eight hundred eighty-one thousand, seven hundred five".