1683686686687 has 8 divisors (see below), whose sum is σ = 1772450089200. Its totient is φ = 1594938115584.

The previous prime is 1683686686639. The next prime is 1683686686697. The reversal of 1683686686687 is 7866866863861.

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 1683686686687 - 2³⁵ = 1649326948319 is a prime.

It is a super-3 number, since 3×1683686686687³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683686686697) 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, 3474448 + ... + 3929269.

It is an arithmetic number, because the mean of its divisors is an integer number (221556261150).

Almost surely, 2^{1683686686687} is an apocalyptic number.

1683686686687 is a deficient number, since it is larger than the sum of its proper divisors (88763402513).

1683686686687 is a wasteful number, since it uses less digits than its factorization.

1683686686687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7415705.

The product of its digits is 4013162496, while the sum is 79.

The spelling of 1683686686687 in words is "one trillion, six hundred eighty-three billion, six hundred eighty-six million, six hundred eighty-six thousand, six hundred eighty-seven".