8666689705 has 8 divisors (see below), whose sum is σ = 10400544000. Its totient is φ = 6933007536.

The previous prime is 8666689687. The next prime is 8666689711. The reversal of 8666689705 is 5079866668.

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

It is a cyclic number.

It is not a de Polignac number, because 8666689705 - 2⁵ = 8666689673 is a prime.

It is a super-2 number, since 2×8666689705² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133846 + ... + 187744.

It is an arithmetic number, because the mean of its divisors is an integer number (1300068000).

Almost surely, 2^8666689705 is an apocalyptic number.

It is an amenable number.

8666689705 is a deficient number, since it is larger than the sum of its proper divisors (1733854295).

8666689705 is a wasteful number, since it uses less digits than its factorization.

8666689705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86063.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The square root of 8666689705 is about 93095.0573607428. The cubic root of 8666689705 is about 2054.0818693473.

The spelling of 8666689705 in words is "eight billion, six hundred sixty-six million, six hundred eighty-nine thousand, seven hundred five".