12010661 has 6 divisors (see below), whose sum is σ = 13005810. Its totient is φ = 11086608.

The previous prime is 12010651. The next prime is 12010667. The reversal of 12010661 is 16601021.

It is a happy number.

12010661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1674436 + 10336225 = 1294^2 + 3215^2 .

It is not a de Polignac number, because 12010661 - 2¹⁰ = 12009637 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 (12010667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35366 + ... + 35703.

It is an arithmetic number, because the mean of its divisors is an integer number (2167635).

Almost surely, 2^12010661 is an apocalyptic number.

It is an amenable number.

12010661 is a deficient number, since it is larger than the sum of its proper divisors (995149).

12010661 is an equidigital number, since it uses as much as digits as its factorization.

12010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71095 (or 71082 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 12010661 is about 3465.6400563244. The cubic root of 12010661 is about 229.0106273235.

Adding to 12010661 its reverse (16601021), we get a palindrome (28611682).

The spelling of 12010661 in words is "twelve million, ten thousand, six hundred sixty-one".