11590661 has 4 divisors (see below), whose sum is σ = 11597472. Its totient is φ = 11583852.

The previous prime is 11590637. The next prime is 11590669. The reversal of 11590661 is 16609511.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16609511 = 53 ⋅313387.

It is a cyclic number.

It is not a de Polignac number, because 11590661 - 2¹⁰ = 11589637 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 (11590669) 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, 1616 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (2899368).

Almost surely, 2^11590661 is an apocalyptic number.

It is an amenable number.

11590661 is a deficient number, since it is larger than the sum of its proper divisors (6811).

11590661 is an equidigital number, since it uses as much as digits as its factorization.

11590661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 11590661 is about 3404.5059847208. The cubic root of 11590661 is about 226.3094736968.

The spelling of 11590661 in words is "eleven million, five hundred ninety thousand, six hundred sixty-one".