1666587330189 has 24 divisors (see below), whose sum is σ = 2490135398400. Its totient is φ = 1072972833120.

The previous prime is 1666587330091. The next prime is 1666587330203. The reversal of 1666587330189 is 9810337856661.

It is not a de Polignac number, because 1666587330189 - 2¹² = 1666587326093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666587340189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6101674 + ... + 6368955.

It is an arithmetic number, because the mean of its divisors is an integer number (103755641600).

Almost surely, 2^{1666587330189} is an apocalyptic number.

It is an amenable number.

1666587330189 is a deficient number, since it is larger than the sum of its proper divisors (823548068211).

1666587330189 is a wasteful number, since it uses less digits than its factorization.

1666587330189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471145 (or 12471142 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1666587330189 in words is "one trillion, six hundred sixty-six billion, five hundred eighty-seven million, three hundred thirty thousand, one hundred eighty-nine".