11161666 has 4 divisors (see below), whose sum is σ = 16742502. Its totient is φ = 5580832.

The previous prime is 11161663. The next prime is 11161681. The reversal of 11161666 is 66616111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66616111 = 1409 ⋅47279.

It can be written as a sum of positive squares in only one way, i.e., 8288641 + 2873025 = 2879^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (11161663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2790415 + ... + 2790418.

Almost surely, 2^11161666 is an apocalyptic number.

11161666 is a deficient number, since it is larger than the sum of its proper divisors (5580836).

11161666 is an equidigital number, since it uses as much as digits as its factorization.

11161666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580835.

The product of its digits is 1296, while the sum is 28.

The square root of 11161666 is about 3340.9079604203. The cubic root of 11161666 is about 223.4822357913.

Adding to 11161666 its reverse (66616111), we get a palindrome (77777777).

The spelling of 11161666 in words is "eleven million, one hundred sixty-one thousand, six hundred sixty-six".