1166143647 has 8 divisors (see below), whose sum is σ = 1605015040. Its totient is φ = 752350680.

The previous prime is 1166143637. The next prime is 1166143661. The reversal of 1166143647 is 7463416611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1166143647 - 2⁷ = 1166143519 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 (1166143637) 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, 6269497 + ... + 6269682.

It is an arithmetic number, because the mean of its divisors is an integer number (200626880).

Almost surely, 2^1166143647 is an apocalyptic number.

1166143647 is a deficient number, since it is larger than the sum of its proper divisors (438871393).

1166143647 is a wasteful number, since it uses less digits than its factorization.

1166143647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12539213.

The product of its digits is 72576, while the sum is 39.

The square root of 1166143647 is about 34148.8454709672. The cubic root of 1166143647 is about 1052.5692627483.

The spelling of 1166143647 in words is "one billion, one hundred sixty-six million, one hundred forty-three thousand, six hundred forty-seven".