11061661 has 4 divisors (see below), whose sum is σ = 11912572. Its totient is φ = 10210752.

The previous prime is 11061641. The next prime is 11061671. The reversal of 11061661 is 16616011.

11061661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16616011 = 229 ⋅72559.

It can be written as a sum of positive squares in 2 ways, for example, as 4202500 + 6859161 = 2050^2 + 2619^2 .

It is a cyclic number.

It is not a de Polignac number, because 11061661 - 2¹⁵ = 11028893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11061641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425436 + ... + 425461.

It is an arithmetic number, because the mean of its divisors is an integer number (2978143).

Almost surely, 2^11061661 is an apocalyptic number.

It is an amenable number.

11061661 is a deficient number, since it is larger than the sum of its proper divisors (850911).

11061661 is an equidigital number, since it uses as much as digits as its factorization.

11061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850910.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 11061661 is about 3325.9075453175. The cubic root of 11061661 is about 222.8127890466.

Adding to 11061661 its reverse (16616011), we get a palindrome (27677672).

The spelling of 11061661 in words is "eleven million, sixty-one thousand, six hundred sixty-one".