1121611666 has 48 divisors (see below), whose sum is σ = 2019364992. Its totient is φ = 465612000.

The previous prime is 1121611661. The next prime is 1121611693. The reversal of 1121611666 is 6661161211.

It is not an unprimeable number, because it can be changed into a prime (1121611661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 464001 + ... + 466411.

It is an arithmetic number, because the mean of its divisors is an integer number (42070104).

Almost surely, 2^1121611666 is an apocalyptic number.

1121611666 is a deficient number, since it is larger than the sum of its proper divisors (897753326).

1121611666 is a wasteful number, since it uses less digits than its factorization.

1121611666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575 (or 2568 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 1121611666 is about 33490.4712716916. The cubic root of 1121611666 is about 1038.9967105677.

Adding to 1121611666 its reverse (6661161211), we get a palindrome (7782772877).

The spelling of 1121611666 in words is "one billion, one hundred twenty-one million, six hundred eleven thousand, six hundred sixty-six".