16660371621206 has 16 divisors (see below), whose sum is σ = 26307369693360. Its totient is φ = 7891299048960.

The previous prime is 16660371621199. The next prime is 16660371621209. The reversal of 16660371621206 is 60212617306661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660371621209) 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, 11997851 + ... + 13314246.

It is an arithmetic number, because the mean of its divisors is an integer number (1644210605835).

Almost surely, 2^{16660371621206} is an apocalyptic number.

16660371621206 is a deficient number, since it is larger than the sum of its proper divisors (9646998072154).

16660371621206 is a wasteful number, since it uses less digits than its factorization.

16660371621206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25329439.

The product of its (nonzero) digits is 653184, while the sum is 47.

Adding to 16660371621206 its reverse (60212617306661), we get a palindrome (76872988927867).

The spelling of 16660371621206 in words is "sixteen trillion, six hundred sixty billion, three hundred seventy-one million, six hundred twenty-one thousand, two hundred six".