1123355666 has 4 divisors (see below), whose sum is σ = 1685033502. Its totient is φ = 561677832.

The previous prime is 1123355659. The next prime is 1123355671. The reversal of 1123355666 is 6665533211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1120843441 + 2512225 = 33479^2 + 1585^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280838915 + ... + 280838918.

Almost surely, 2^1123355666 is an apocalyptic number.

1123355666 is a deficient number, since it is larger than the sum of its proper divisors (561677836).

1123355666 is an equidigital number, since it uses as much as digits as its factorization.

1123355666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561677835.

The product of its digits is 97200, while the sum is 38.

The square root of 1123355666 is about 33516.4984149598. The cubic root of 1123355666 is about 1039.5349455500.

Adding to 1123355666 its reverse (6665533211), we get a palindrome (7788888877).

The spelling of 1123355666 in words is "one billion, one hundred twenty-three million, three hundred fifty-five thousand, six hundred sixty-six".