221278106966 has 48 divisors (see below), whose sum is σ = 393551233200. Its totient is φ = 93006688320.

The previous prime is 221278106939. The next prime is 221278106969. The reversal of 221278106966 is 669601872122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221278106969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15632060 + ... + 15646208.

It is an arithmetic number, because the mean of its divisors is an integer number (8198984025).

Almost surely, 2^221278106966 is an apocalyptic number.

221278106966 is a deficient number, since it is larger than the sum of its proper divisors (172273126234).

221278106966 is a wasteful number, since it uses less digits than its factorization.

221278106966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17229 (or 17222 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 221278106966 in words is "two hundred twenty-one billion, two hundred seventy-eight million, one hundred six thousand, nine hundred sixty-six".