1666818183339 has 12 divisors (see below), whose sum is σ = 2422961466016. Its totient is φ = 1104134337072.

The previous prime is 1666818183337. The next prime is 1666818183341. The reversal of 1666818183339 is 9333818186661.

It is an interprime number because it is at equal distance from previous prime (1666818183337) and next prime (1666818183341).

It is not a de Polignac number, because 1666818183339 - 2¹ = 1666818183337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666818183337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589813939 + ... + 589816764.

Almost surely, 2^{1666818183339} is an apocalyptic number.

1666818183339 is a deficient number, since it is larger than the sum of its proper divisors (756143282677).

1666818183339 is a wasteful number, since it uses less digits than its factorization.

1666818183339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179630866 (or 1179630863 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 1666818183339 in words is "one trillion, six hundred sixty-six billion, eight hundred eighteen million, one hundred eighty-three thousand, three hundred thirty-nine".