1127521666 has 8 divisors (see below), whose sum is σ = 1691498304. Its totient is φ = 563688900.

The previous prime is 1127521649. The next prime is 1127521669. The reversal of 1127521666 is 6661257211.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1127521669) by changing a digit.

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, 13590 + ... + 49393.

It is an arithmetic number, because the mean of its divisors is an integer number (211437288).

Almost surely, 2^1127521666 is an apocalyptic number.

1127521666 is a deficient number, since it is larger than the sum of its proper divisors (563976638).

1127521666 is an equidigital number, since it uses as much as digits as its factorization.

1127521666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71936.

The product of its digits is 30240, while the sum is 37.

The square root of 1127521666 is about 33578.5893986034. The cubic root of 1127521666 is about 1040.8184096688.

Adding to 1127521666 its reverse (6661257211), we get a palindrome (7788778877).

The spelling of 1127521666 in words is "one billion, one hundred twenty-seven million, five hundred twenty-one thousand, six hundred sixty-six".