21660366300125 has 64 divisors (see below), whose sum is σ = 32793562354176. Its totient is φ = 13943911449600.

The previous prime is 21660366300047. The next prime is 21660366300187. The reversal of 21660366300125 is 52100366306612.

It is not a de Polignac number, because 21660366300125 - 2²⁶ = 21660299191261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4071422 + ... + 7739328.

It is an arithmetic number, because the mean of its divisors is an integer number (512399411784).

Almost surely, 2^{21660366300125} is an apocalyptic number.

21660366300125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21660366300125 is a deficient number, since it is larger than the sum of its proper divisors (11133196054051).

21660366300125 is a wasteful number, since it uses less digits than its factorization.

21660366300125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668343 (or 3668333 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 21660366300125 in words is "twenty-one trillion, six hundred sixty billion, three hundred sixty-six million, three hundred thousand, one hundred twenty-five".