221703336666 has 24 divisors (see below), whose sum is σ = 548979691104. Its totient is φ = 63343810440.

The previous prime is 221703336629. The next prime is 221703336689. The reversal of 221703336666 is 666633307122.

221703336666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 879775020 + ... + 879775271.

It is an arithmetic number, because the mean of its divisors is an integer number (22874153796).

Almost surely, 2^221703336666 is an apocalyptic number.

221703336666 is an abundant number, since it is smaller than the sum of its proper divisors (327276354438).

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

221703336666 is a wasteful number, since it uses less digits than its factorization.

221703336666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759550306 (or 1759550303 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 45.

The spelling of 221703336666 in words is "two hundred twenty-one billion, seven hundred three million, three hundred thirty-six thousand, six hundred sixty-six".