1660211215206 has 16 divisors (see below), whose sum is σ = 3344659092144. Its totient is φ = 549364294784.

The previous prime is 1660211215189. The next prime is 1660211215211. The reversal of 1660211215206 is 6025121120661.

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 7 ways as a sum of consecutive naturals, for example, 1009860015 + ... + 1009861658.

It is an arithmetic number, because the mean of its divisors is an integer number (209041193259).

Almost surely, 2^{1660211215206} is an apocalyptic number.

1660211215206 is an abundant number, since it is smaller than the sum of its proper divisors (1684447876938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660211215206 is a wasteful number, since it uses less digits than its factorization.

1660211215206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019721815.

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 1660211215206 its reverse (6025121120661), we get a palindrome (7685332335867).

The spelling of 1660211215206 in words is "one trillion, six hundred sixty billion, two hundred eleven million, two hundred fifteen thousand, two hundred six".