11641566 has 32 divisors (see below), whose sum is σ = 25954560. Its totient is φ = 3459456.

The previous prime is 11641559. The next prime is 11641579. The reversal of 11641566 is 66514611.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066 + ... + 4941.

It is an arithmetic number, because the mean of its divisors is an integer number (811080).

Almost surely, 2^11641566 is an apocalyptic number.

11641566 is an abundant number, since it is smaller than the sum of its proper divisors (14312994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11641566 is a wasteful number, since it uses less digits than its factorization.

11641566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6048.

The product of its digits is 4320, while the sum is 30.

The square root of 11641566 is about 3411.9739154923. The cubic root of 11641566 is about 226.6402992205.

The spelling of 11641566 in words is "eleven million, six hundred forty-one thousand, five hundred sixty-six".