1668536683667 has 16 divisors (see below), whose sum is σ = 2007304757760. Its totient is φ = 1354873226112.

The previous prime is 1668536683661. The next prime is 1668536683687. The reversal of 1668536683667 is 7663866358661.

It is not a de Polignac number, because 1668536683667 - 2¹² = 1668536679571 is a prime.

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 1668536683667.

It is not an unprimeable number, because it can be changed into a prime (1668536683661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8040203 + ... + 8245115.

It is an arithmetic number, because the mean of its divisors is an integer number (125456547360).

Almost surely, 2^{1668536683667} is an apocalyptic number.

1668536683667 is a deficient number, since it is larger than the sum of its proper divisors (338768074093).

1668536683667 is a wasteful number, since it uses less digits than its factorization.

1668536683667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266162.

The product of its digits is 940584960, while the sum is 71.

The spelling of 1668536683667 in words is "one trillion, six hundred sixty-eight billion, five hundred thirty-six million, six hundred eighty-three thousand, six hundred sixty-seven".