21660366226412 has 12 divisors (see below), whose sum is σ = 38098055318400. Its totient is φ = 10775207564016.

The previous prime is 21660366226397. The next prime is 21660366226417. The reversal of 21660366226412 is 21462266306612.

It is not an unprimeable number, because it can be changed into a prime (21660366226417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13743886412 + ... + 13743887987.

It is an arithmetic number, because the mean of its divisors is an integer number (3174837943200).

Almost surely, 2^{21660366226412} is an apocalyptic number.

It is an amenable number.

21660366226412 is a deficient number, since it is larger than the sum of its proper divisors (16437689091988).

21660366226412 is a wasteful number, since it uses less digits than its factorization.

21660366226412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27487774600 (or 27487774598 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 21660366226412 in words is "twenty-one trillion, six hundred sixty billion, three hundred sixty-six million, two hundred twenty-six thousand, four hundred twelve".