1066816849 has 4 divisors (see below), whose sum is σ = 1219219264. Its totient is φ = 914414436.

The previous prime is 1066816847. The next prime is 1066816853. The reversal of 1066816849 is 9486186601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9486186601 = 19 ⋅499272979.

It is a cyclic number.

It is not a de Polignac number, because 1066816849 - 2¹ = 1066816847 is a prime.

It is a super-2 number, since 2×1066816849² = 2276196378620577602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066816847) 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 in 3 ways as a sum of consecutive naturals, for example, 76201197 + ... + 76201210.

It is an arithmetic number, because the mean of its divisors is an integer number (304804816).

Almost surely, 2^1066816849 is an apocalyptic number.

It is an amenable number.

1066816849 is a deficient number, since it is larger than the sum of its proper divisors (152402415).

1066816849 is an equidigital number, since it uses as much as digits as its factorization.

1066816849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152402414.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1066816849 is about 32662.1623442172. The cubic root of 1066816849 is about 1021.7938601655.

The spelling of 1066816849 in words is "one billion, sixty-six million, eight hundred sixteen thousand, eight hundred forty-nine".