11666205546533 has 8 divisors (see below), whose sum is σ = 12116132092440. Its totient is φ = 11223364458240.

The previous prime is 11666205546529. The next prime is 11666205546587. The reversal of 11666205546533 is 33564550266611.

It can be written as a sum of positive squares in 4 ways, for example, as 4640138193604 + 7026067352929 = 2154098^2 + 2650673^2 .

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 11666205546533 - 2² = 11666205546529 is a prime.

It is a super-2 number, since 2×11666205546533² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666205546133) 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, 1771361048 + ... + 1771367633.

It is an arithmetic number, because the mean of its divisors is an integer number (1514516511555).

Almost surely, 2^{11666205546533} is an apocalyptic number.

It is an amenable number.

11666205546533 is a deficient number, since it is larger than the sum of its proper divisors (449926545907).

11666205546533 is an equidigital number, since it uses as much as digits as its factorization.

11666205546533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542728807.

The product of its (nonzero) digits is 11664000, while the sum is 53.

The spelling of 11666205546533 in words is "eleven trillion, six hundred sixty-six billion, two hundred five million, five hundred forty-six thousand, five hundred thirty-three".