99978866444222 has 16 divisors (see below), whose sum is σ = 150013781078544. Its totient is φ = 49974273240000.

The previous prime is 99978866444117. The next prime is 99978866444239. The reversal of 99978866444222 is 22244466887999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747153722 + ... + 747287522.

It is an arithmetic number, because the mean of its divisors is an integer number (9375861317409).

Almost surely, 2^{99978866444222} is an apocalyptic number.

99978866444222 is a deficient number, since it is larger than the sum of its proper divisors (50034914634322).

99978866444222 is a wasteful number, since it uses less digits than its factorization.

99978866444222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244315.

The product of its digits is 6019743744, while the sum is 80.

The spelling of 99978866444222 in words is "ninety-nine trillion, nine hundred seventy-eight billion, eight hundred sixty-six million, four hundred forty-four thousand, two hundred twenty-two".