1121756666 has 8 divisors (see below), whose sum is σ = 1682797140. Its totient is φ = 560824288.

The previous prime is 1121756659. The next prime is 1121756689. The reversal of 1121756666 is 6666571211.

It can be written as a sum of positive squares in 2 ways, for example, as 1024320025 + 97436641 = 32005^2 + 9871^2 .

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

It is a Curzon number.

It is an unprimeable number.

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, 8000 + ... + 48036.

Almost surely, 2^1121756666 is an apocalyptic number.

1121756666 is a deficient number, since it is larger than the sum of its proper divisors (561040474).

1121756666 is a wasteful number, since it uses less digits than its factorization.

1121756666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54048.

The product of its digits is 90720, while the sum is 41.

The square root of 1121756666 is about 33492.6359965889. The cubic root of 1121756666 is about 1039.0414818660.

The spelling of 1121756666 in words is "one billion, one hundred twenty-one million, seven hundred fifty-six thousand, six hundred sixty-six".