685586806 has 32 divisors (see below), whose sum is σ = 1100252160. Its totient is φ = 319697664.

The previous prime is 685586777. The next prime is 685586809. The reversal of 685586806 is 608685586.

It is a super-2 number, since 2×685586806² = 940058537122563272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685586809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300486 + ... + 302758.

It is an arithmetic number, because the mean of its divisors is an integer number (34382880).

Almost surely, 2^685586806 is an apocalyptic number.

685586806 is a deficient number, since it is larger than the sum of its proper divisors (414665354).

685586806 is a wasteful number, since it uses less digits than its factorization.

685586806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The square root of 685586806 is about 26183.7126091775. The cubic root of 685586806 is about 881.7676273159.

The spelling of 685586806 in words is "six hundred eighty-five million, five hundred eighty-six thousand, eight hundred six".