21660366226411 has 8 divisors (see below), whose sum is σ = 23630976657648. Its totient is φ = 19690003500000.

The previous prime is 21660366226397. The next prime is 21660366226417. The reversal of 21660366226411 is 11462266306612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21660366226411 - 2⁹ = 21660366225899 is a prime.

It is a super-2 number, since 2×21660366226411² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 61743340 + ... + 62093161.

It is an arithmetic number, because the mean of its divisors is an integer number (2953872082206).

Almost surely, 2^{21660366226411} is an apocalyptic number.

21660366226411 is a deficient number, since it is larger than the sum of its proper divisors (1970610431237).

21660366226411 is a wasteful number, since it uses less digits than its factorization.

21660366226411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123852413.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 21660366226411 in words is "twenty-one trillion, six hundred sixty billion, three hundred sixty-six million, two hundred twenty-six thousand, four hundred eleven".