685656106 has 16 divisors (see below), whose sum is σ = 1068422400. Its totient is φ = 329614768.

The previous prime is 685656073. The next prime is 685656137. The reversal of 685656106 is 601656586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10870 + ... + 38593.

It is an arithmetic number, because the mean of its divisors is an integer number (66776400).

Almost surely, 2^685656106 is an apocalyptic number.

685656106 is a deficient number, since it is larger than the sum of its proper divisors (382766294).

685656106 is a wasteful number, since it uses less digits than its factorization.

685656106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49733.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 685656106 is about 26185.0359174854. The cubic root of 685656106 is about 881.7973363852.

The spelling of 685656106 in words is "six hundred eighty-five million, six hundred fifty-six thousand, one hundred six".