1211132666 has 16 divisors (see below), whose sum is σ = 2007198144. Its totient is φ = 545164224.

The previous prime is 1211132653. The next prime is 1211132687. The reversal of 1211132666 is 6662311121.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773600 + ... + 775163.

It is an arithmetic number, because the mean of its divisors is an integer number (125449884).

Almost surely, 2^1211132666 is an apocalyptic number.

1211132666 is a deficient number, since it is larger than the sum of its proper divisors (796065478).

1211132666 is a wasteful number, since it uses less digits than its factorization.

1211132666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548805.

The product of its digits is 2592, while the sum is 29.

The square root of 1211132666 is about 34801.3313825779. The cubic root of 1211132666 is about 1065.9346320858.

Adding to 1211132666 its reverse (6662311121), we get a palindrome (7873443787).

The spelling of 1211132666 in words is "one billion, two hundred eleven million, one hundred thirty-two thousand, six hundred sixty-six".