11666205546587 has 2 divisors, whose sum is σ = 11666205546588. Its totient is φ = 11666205546586.

The previous prime is 11666205546529. The next prime is 11666205546613. The reversal of 11666205546587 is 78564550266611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11666205546587 - 2¹² = 11666205542491 is a prime.

It is a super-2 number, since 2×11666205546587² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11666202546587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833102773293 + 5833102773294.

It is an arithmetic number, because the mean of its divisors is an integer number (5833102773294).

Almost surely, 2^{11666205546587} is an apocalyptic number.

11666205546587 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666205546587 is an equidigital number, since it uses as much as digits as its factorization.

11666205546587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576000, while the sum is 62.

The spelling of 11666205546587 in words is "eleven trillion, six hundred sixty-six billion, two hundred five million, five hundred forty-six thousand, five hundred eighty-seven".