1166650065505 has 4 divisors (see below), whose sum is σ = 1399980078612. Its totient is φ = 933320052400.

The previous prime is 1166650065499. The next prime is 1166650065517. The reversal of 1166650065505 is 5055600566611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281167183504 + 885482882001 = 530252^2 + 941001^2 .

It is not a de Polignac number, because 1166650065505 - 2⁷ = 1166650065377 is a prime.

It is a super-2 number, since 2×1166650065505² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 116665006546 + ... + 116665006555.

It is an arithmetic number, because the mean of its divisors is an integer number (349995019653).

Almost surely, 2^{1166650065505} is an apocalyptic number.

It is an amenable number.

1166650065505 is a deficient number, since it is larger than the sum of its proper divisors (233330013107).

1166650065505 is an equidigital number, since it uses as much as digits as its factorization.

1166650065505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233330013106.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 1166650065505 in words is "one trillion, one hundred sixty-six billion, six hundred fifty million, sixty-five thousand, five hundred five".