211646366066 has 16 divisors (see below), whose sum is σ = 328434062040. Its totient is φ = 102168729600.

The previous prime is 211646366039. The next prime is 211646366081. The reversal of 211646366066 is 660663646112.

It can be written as a sum of positive squares in 4 ways, for example, as 183496573225 + 28149792841 = 428365^2 + 167779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211646366066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154516 + ... + 1325216.

Almost surely, 2^211646366066 is an apocalyptic number.

211646366066 is a deficient number, since it is larger than the sum of its proper divisors (116787695974).

211646366066 is a wasteful number, since it uses less digits than its factorization.

211646366066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192109.

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 211646366066 in words is "two hundred eleven billion, six hundred forty-six million, three hundred sixty-six thousand, sixty-six".