210666218192 has 10 divisors (see below), whose sum is σ = 408165797778. Its totient is φ = 105333109088.

The previous prime is 210666218173. The next prime is 210666218197. The reversal of 210666218192 is 291812666012.

It can be written as a sum of positive squares in only one way, i.e., 119138186896 + 91528031296 = 345164^2 + 302536^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210666218197) by changing a digit.

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 as a sum of consecutive naturals, namely, 6583319303 + ... + 6583319334.

Almost surely, 2^210666218192 is an apocalyptic number.

It is an amenable number.

210666218192 is a deficient number, since it is larger than the sum of its proper divisors (197499579586).

210666218192 is a wasteful number, since it uses less digits than its factorization.

210666218192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166638645 (or 13166638639 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 210666218192 in words is "two hundred ten billion, six hundred sixty-six million, two hundred eighteen thousand, one hundred ninety-two".