211667222216660 has 48 divisors (see below), whose sum is σ = 508004004848256. Its totient is φ = 72571237398912.

The previous prime is 211667222216477. The next prime is 211667222216663. The reversal of 211667222216660 is 66612222766112.

211667222216660 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211667222216599 and 211667222216608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211667222216663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23412599 + ... + 31168641.

It is an arithmetic number, because the mean of its divisors is an integer number (10583416767672).

Almost surely, 2^{211667222216660} is an apocalyptic number.

211667222216660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211667222216660 is an abundant number, since it is smaller than the sum of its proper divisors (296336782631596).

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

211667222216660 is a wasteful number, since it uses less digits than its factorization.

211667222216660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950992 (or 7950990 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 211667222216660 in words is "two hundred eleven trillion, six hundred sixty-seven billion, two hundred twenty-two million, two hundred sixteen thousand, six hundred sixty".