6685995866 has 32 divisors (see below), whose sum is σ = 11312663040. Its totient is φ = 2936102400.

The previous prime is 6685995853. The next prime is 6685995887.

6685995866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6685995796 and 6685995805.

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, 412850 + ... + 428738.

It is an arithmetic number, because the mean of its divisors is an integer number (353520720).

Almost surely, 2^6685995866 is an apocalyptic number.

6685995866 is a deficient number, since it is larger than the sum of its proper divisors (4626667174).

6685995866 is a wasteful number, since it uses less digits than its factorization.

6685995866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16550.

The product of its digits is 167961600, while the sum is 68.

The square root of 6685995866 is about 81767.9391081859. The cubic root of 6685995866 is about 1883.8892499467.

The spelling of 6685995866 in words is "six billion, six hundred eighty-five million, nine hundred ninety-five thousand, eight hundred sixty-six".