11666591073408 has 64 divisors (see below), whose sum is σ = 31023104241600. Its totient is φ = 3884631948288.

The previous prime is 11666591073353. The next prime is 11666591073439. The reversal of 11666591073408 is 80437019566611.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×11666591073408² (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 7 ways as a sum of consecutive naturals, for example, 16176891 + ... + 16882682.

It is an arithmetic number, because the mean of its divisors is an integer number (484736003775).

Almost surely, 2^{11666591073408} is an apocalyptic number.

It is an amenable number.

11666591073408 is an abundant number, since it is smaller than the sum of its proper divisors (19356513168192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11666591073408 is an equidigital number, since it uses as much as digits as its factorization.

11666591073408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33060509 (or 33060497 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 11666591073408 in words is "eleven trillion, six hundred sixty-six billion, five hundred ninety-one million, seventy-three thousand, four hundred eight".