68705685 has 16 divisors (see below), whose sum is σ = 122143680. Its totient is φ = 36642960.

The previous prime is 68705647. The next prime is 68705713. The reversal of 68705685 is 58650786.

68705685 is a `hidden beast` number, since 6 + 87 + 0 + 568 + 5 = 666.

It is not a de Polignac number, because 68705685 - 2⁶ = 68705621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68705685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254331 + ... + 254600.

It is an arithmetic number, because the mean of its divisors is an integer number (7633980).

Almost surely, 2^68705685 is an apocalyptic number.

It is an amenable number.

68705685 is a deficient number, since it is larger than the sum of its proper divisors (53437995).

68705685 is a wasteful number, since it uses less digits than its factorization.

68705685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508945 (or 508939 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 68705685 is about 8288.8892500745. The cubic root of 68705685 is about 409.5725964492.

The spelling of 68705685 in words is "sixty-eight million, seven hundred five thousand, six hundred eighty-five".