8218686806 has 8 divisors (see below), whose sum is σ = 13448760264. Its totient is φ = 3735766720.

The previous prime is 8218686781. The next prime is 8218686841. The reversal of 8218686806 is 6086868128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186788315 + ... + 186788358.

It is an arithmetic number, because the mean of its divisors is an integer number (1681095033).

Almost surely, 2^8218686806 is an apocalyptic number.

8218686806 is a deficient number, since it is larger than the sum of its proper divisors (5230073458).

8218686806 is a wasteful number, since it uses less digits than its factorization.

8218686806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373576686.

The product of its (nonzero) digits is 1769472, while the sum is 53.

The square root of 8218686806 is about 90656.9732894277. The cubic root of 8218686806 is about 2018.0603219825.

The spelling of 8218686806 in words is "eight billion, two hundred eighteen million, six hundred eighty-six thousand, eight hundred six".