12225666550 has 12 divisors (see below), whose sum is σ = 22739739876. Its totient is φ = 4890266600.

The previous prime is 12225666547. The next prime is 12225666599. The reversal of 12225666550 is 5566652221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122256616 + ... + 122256715.

It is an arithmetic number, because the mean of its divisors is an integer number (1894978323).

Almost surely, 2^12225666550 is an apocalyptic number.

12225666550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12225666550 is a deficient number, since it is larger than the sum of its proper divisors (10514073326).

12225666550 is a wasteful number, since it uses less digits than its factorization.

12225666550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244513343 (or 244513338 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 12225666550 in words is "twelve billion, two hundred twenty-five million, six hundred sixty-six thousand, five hundred fifty".