1666685168335 has 16 divisors (see below), whose sum is σ = 2182029236352. Its totient is φ = 1212030871200.

The previous prime is 1666685168333. The next prime is 1666685168339. The reversal of 1666685168335 is 5338615866661.

It is not a de Polignac number, because 1666685168335 - 2¹ = 1666685168333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666685168333) 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, 646389 + ... + 1936798.

It is an arithmetic number, because the mean of its divisors is an integer number (136376827272).

Almost surely, 2^{1666685168335} is an apocalyptic number.

1666685168335 is a deficient number, since it is larger than the sum of its proper divisors (515344068017).

1666685168335 is a wasteful number, since it uses less digits than its factorization.

1666685168335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594934.

The product of its digits is 111974400, while the sum is 64.

The spelling of 1666685168335 in words is "one trillion, six hundred sixty-six billion, six hundred eighty-five million, one hundred sixty-eight thousand, three hundred thirty-five".