8051661686 has 16 divisors (see below), whose sum is σ = 13133555136. Its totient is φ = 3686610816.

The previous prime is 8051661647. The next prime is 8051661691. The reversal of 8051661686 is 6861661508.

It is a self number, because there is not a number n which added to its sum of digits gives 8051661686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3198926 + ... + 3201441.

It is an arithmetic number, because the mean of its divisors is an integer number (820847196).

Almost surely, 2^8051661686 is an apocalyptic number.

8051661686 is a deficient number, since it is larger than the sum of its proper divisors (5081893450).

8051661686 is a wasteful number, since it uses less digits than its factorization.

8051661686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400423.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 8051661686 is about 89731.0519608458. The cubic root of 8051661686 is about 2004.2959064870.

The spelling of 8051661686 in words is "eight billion, fifty-one million, six hundred sixty-one thousand, six hundred eighty-six".