11666621520305 has 16 divisors (see below), whose sum is σ = 14736893371200. Its totient is φ = 8842006071360.

The previous prime is 11666621520283. The next prime is 11666621520319. The reversal of 11666621520305 is 50302512666611.

11666621520305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11666621520305 - 2⁶ = 11666621520241 is a prime.

It is a super-2 number, since 2×11666621520305² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15495275 + ... + 16230735.

It is an arithmetic number, because the mean of its divisors is an integer number (921055835700).

Almost surely, 2^{11666621520305} is an apocalyptic number.

It is an amenable number.

11666621520305 is a deficient number, since it is larger than the sum of its proper divisors (3070271850895).

11666621520305 is a wasteful number, since it uses less digits than its factorization.

11666621520305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902464.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 11666621520305 in words is "eleven trillion, six hundred sixty-six billion, six hundred twenty-one million, five hundred twenty thousand, three hundred five".