68705656 has 8 divisors (see below), whose sum is σ = 128823120. Its totient is φ = 34352824.

The previous prime is 68705647. The next prime is 68705713. The reversal of 68705656 is 65650786.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4294096 + ... + 4294111.

It is an arithmetic number, because the mean of its divisors is an integer number (16102890).

Almost surely, 2^68705656 is an apocalyptic number.

It is an amenable number.

68705656 is a deficient number, since it is larger than the sum of its proper divisors (60117464).

68705656 is a wasteful number, since it uses less digits than its factorization.

68705656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8588213 (or 8588209 counting only the distinct ones).

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

The square root of 68705656 is about 8288.8875007446. The cubic root of 68705656 is about 409.5725388236.

The spelling of 68705656 in words is "sixty-eight million, seven hundred five thousand, six hundred fifty-six".