1666220974113 has 8 divisors (see below), whose sum is σ = 2221713520000. Its totient is φ = 1110771205488.

The previous prime is 1666220974091. The next prime is 1666220974141. The reversal of 1666220974113 is 3114790226661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1666220974113 - 2¹⁷ = 1666220843041 is a prime.

It is a super-2 number, since 2×1666220974113² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666220979113) 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, 10603318 + ... + 10759311.

It is an arithmetic number, because the mean of its divisors is an integer number (277714190000).

Almost surely, 2^{1666220974113} is an apocalyptic number.

It is an amenable number.

1666220974113 is a deficient number, since it is larger than the sum of its proper divisors (555492545887).

1666220974113 is a wasteful number, since it uses less digits than its factorization.

1666220974113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21388631.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 1666220974113 in words is "one trillion, six hundred sixty-six billion, two hundred twenty million, nine hundred seventy-four thousand, one hundred thirteen".