163681706 has 8 divisors (see below), whose sum is σ = 245600640. Its totient is φ = 81814828.

The previous prime is 163681681. The next prime is 163681723. The reversal of 163681706 is 607186361.

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

It is a self number, because there is not a number n which added to its sum of digits gives 163681706.

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 3 ways as a sum of consecutive naturals, for example, 3866 + ... + 18501.

It is an arithmetic number, because the mean of its divisors is an integer number (30700080).

Almost surely, 2^163681706 is an apocalyptic number.

163681706 is a deficient number, since it is larger than the sum of its proper divisors (81918934).

163681706 is a wasteful number, since it uses less digits than its factorization.

163681706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26028.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 163681706 is about 12793.8151463901. The cubic root of 163681706 is about 547.0160228900.

The spelling of 163681706 in words is "one hundred sixty-three million, six hundred eighty-one thousand, seven hundred six".