1166644499 has 4 divisors (see below), whose sum is σ = 1235270664. Its totient is φ = 1098018336.

The previous prime is 1166644439. The next prime is 1166644513. The reversal of 1166644499 is 9944466611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9944466611 = 337 ⋅29508803.

It is a cyclic number.

It is not a de Polignac number, because 1166644499 - 2¹² = 1166640403 is a prime.

It is a super-2 number, since 2×1166644499² = 2722118774093922002, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1166644439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34313057 + ... + 34313090.

It is an arithmetic number, because the mean of its divisors is an integer number (308817666).

Almost surely, 2^1166644499 is an apocalyptic number.

1166644499 is a deficient number, since it is larger than the sum of its proper divisors (68626165).

1166644499 is an equidigital number, since it uses as much as digits as its factorization.

1166644499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68626164.

The product of its digits is 1119744, while the sum is 50.

The square root of 1166644499 is about 34156.1780502444. The cubic root of 1166644499 is about 1052.7199319979.

It can be divided in two parts, 11666 and 44499, that added together give a palindrome (56165).

The spelling of 1166644499 in words is "one billion, one hundred sixty-six million, six hundred forty-four thousand, four hundred ninety-nine".