1666941339245 has 48 divisors (see below), whose sum is σ = 2516393537280. Its totient is φ = 1050703710336.

The previous prime is 1666941339233. The next prime is 1666941339263. The reversal of 1666941339245 is 5429331496661.

It is not a de Polignac number, because 1666941339245 - 2²⁰ = 1666940290669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 333707 + ... + 1856136.

It is an arithmetic number, because the mean of its divisors is an integer number (52424865360).

Almost surely, 2^{1666941339245} is an apocalyptic number.

It is an amenable number.

1666941339245 is a deficient number, since it is larger than the sum of its proper divisors (849452198035).

1666941339245 is a wasteful number, since it uses less digits than its factorization.

1666941339245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190114 (or 2190107 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 59.

The spelling of 1666941339245 in words is "one trillion, six hundred sixty-six billion, nine hundred forty-one million, three hundred thirty-nine thousand, two hundred forty-five".