11666166560560 has 20 divisors (see below), whose sum is σ = 27123837253488. Its totient is φ = 4666466624192.

The previous prime is 11666166560557. The next prime is 11666166560561. The reversal of 11666166560560 is 6506566166611.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (11666166560561) 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, 72913540924 + ... + 72913541083.

Almost surely, 2^{11666166560560} is an apocalyptic number.

11666166560560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11666166560560 is an abundant number, since it is smaller than the sum of its proper divisors (15457670692928).

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

11666166560560 is a wasteful number, since it uses less digits than its factorization.

11666166560560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145827082020 (or 145827082014 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 11666166560560 in words is "eleven trillion, six hundred sixty-six billion, one hundred sixty-six million, five hundred sixty thousand, five hundred sixty".