1166384695447 has 4 divisors (see below), whose sum is σ = 1182812648976. Its totient is φ = 1149956741920.

The previous prime is 1166384695423. The next prime is 1166384695453. The reversal of 1166384695447 is 7445964836611.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1166384695447 - 2³¹ = 1164237211799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166384695417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8213976658 + ... + 8213976799.

It is an arithmetic number, because the mean of its divisors is an integer number (295703162244).

Almost surely, 2^{1166384695447} is an apocalyptic number.

1166384695447 is a deficient number, since it is larger than the sum of its proper divisors (16427953529).

1166384695447 is an equidigital number, since it uses as much as digits as its factorization.

1166384695447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16427953528.

The product of its digits is 104509440, while the sum is 64.

The spelling of 1166384695447 in words is "one trillion, one hundred sixty-six billion, three hundred eighty-four million, six hundred ninety-five thousand, four hundred forty-seven".