986666689 has 8 divisors (see below), whose sum is σ = 1045702440. Its totient is φ = 927741696.

The previous prime is 986666663. The next prime is 986666699.

986666689 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 613404289 + 373262400 = 24767^2 + 19320^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-986666689 is a prime.

It is a super-2 number, since 2×986666689² = 1947022310364445442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 986666689.

It is not an unprimeable number, because it can be changed into a prime (986666699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8974 + ... + 45319.

It is an arithmetic number, because the mean of its divisors is an integer number (130712805).

Almost surely, 2^986666689 is an apocalyptic number.

It is an amenable number.

986666689 is a deficient number, since it is larger than the sum of its proper divisors (59035751).

986666689 is a wasteful number, since it uses less digits than its factorization.

986666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55379.

The product of its digits is 40310784, while the sum is 64.

The square root of 986666689 is about 31411.2509938716. The cubic root of 986666689 is about 995.5356623479.

The spelling of 986666689 in words is "nine hundred eighty-six million, six hundred sixty-six thousand, six hundred eighty-nine".