1811849966 has 8 divisors (see below), whose sum is σ = 2791228440. Its totient is φ = 881440488.

The previous prime is 1811849947. The next prime is 1811849969. The reversal of 1811849966 is 6699481181.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811849969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12242156 + ... + 12242303.

It is an arithmetic number, because the mean of its divisors is an integer number (348903555).

Almost surely, 2^1811849966 is an apocalyptic number.

1811849966 is a deficient number, since it is larger than the sum of its proper divisors (979378474).

1811849966 is a wasteful number, since it uses less digits than its factorization.

1811849966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24484498.

The product of its digits is 746496, while the sum is 53.

The square root of 1811849966 is about 42565.8309680429. The cubic root of 1811849966 is about 1219.1039658221.

The spelling of 1811849966 in words is "one billion, eight hundred eleven million, eight hundred forty-nine thousand, nine hundred sixty-six".