1686664885459 has 8 divisors (see below), whose sum is σ = 1695190032000. Its totient is φ = 1678154950656.

The previous prime is 1686664885453. The next prime is 1686664885489. The reversal of 1686664885459 is 9545884666861.

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 1686664885459 - 2⁵ = 1686664885427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1686664885453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3580584 + ... + 4024165.

It is an arithmetic number, because the mean of its divisors is an integer number (211898754000).

Almost surely, 2^{1686664885459} is an apocalyptic number.

1686664885459 is a deficient number, since it is larger than the sum of its proper divisors (8525146541).

1686664885459 is an equidigital number, since it uses as much as digits as its factorization.

1686664885459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605869.

The product of its digits is 2388787200, while the sum is 76.

The spelling of 1686664885459 in words is "one trillion, six hundred eighty-six billion, six hundred sixty-four million, eight hundred eighty-five thousand, four hundred fifty-nine".