1211440066 has 8 divisors (see below), whose sum is σ = 1817953344. Its totient is φ = 605455620.

The previous prime is 1211440049. The next prime is 1211440073. The reversal of 1211440066 is 6600441121.

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

It is a super-3 number, since 3×1211440066³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211440066.

It is an unprimeable number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126430 + ... + 135673.

It is an arithmetic number, because the mean of its divisors is an integer number (227244168).

Almost surely, 2^1211440066 is an apocalyptic number.

1211440066 is a deficient number, since it is larger than the sum of its proper divisors (606513278).

1211440066 is a wasteful number, since it uses less digits than its factorization.

1211440066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264416.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1211440066 is about 34805.7476000732. The cubic root of 1211440066 is about 1066.0248067894.

Adding to 1211440066 its reverse (6600441121), we get a palindrome (7811881187).

The spelling of 1211440066 in words is "one billion, two hundred eleven million, four hundred forty thousand, sixty-six".