11151661 has 4 divisors (see below), whose sum is σ = 11511424. Its totient is φ = 10791900.

The previous prime is 11151659. The next prime is 11151671. The reversal of 11151661 is 16615111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11151661 - 2¹ = 11151659 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 (11151671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179835 + ... + 179896.

It is an arithmetic number, because the mean of its divisors is an integer number (2877856).

Almost surely, 2^11151661 is an apocalyptic number.

It is an amenable number.

11151661 is a deficient number, since it is larger than the sum of its proper divisors (359763).

11151661 is an equidigital number, since it uses as much as digits as its factorization.

11151661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359762.

The product of its digits is 180, while the sum is 22.

The square root of 11151661 is about 3339.4102772795. The cubic root of 11151661 is about 223.4154414561.

Adding to 11151661 its reverse (16615111), we get a palindrome (27766772).

The spelling of 11151661 in words is "eleven million, one hundred fifty-one thousand, six hundred sixty-one".