1138244666 has 16 divisors (see below), whose sum is σ = 1935477600. Its totient is φ = 497693808.

The previous prime is 1138244659. The next prime is 1138244669. The reversal of 1138244666 is 6664428311.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1138244669) 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, 1151576 + ... + 1152563.

It is an arithmetic number, because the mean of its divisors is an integer number (120967350).

Almost surely, 2^1138244666 is an apocalyptic number.

1138244666 is a deficient number, since it is larger than the sum of its proper divisors (797232934).

1138244666 is a wasteful number, since it uses less digits than its factorization.

1138244666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304173.

The product of its digits is 165888, while the sum is 41.

The square root of 1138244666 is about 33737.8817651613. The cubic root of 1138244666 is about 1044.1074820958.

The spelling of 1138244666 in words is "one billion, one hundred thirty-eight million, two hundred forty-four thousand, six hundred sixty-six".