11640566 has 16 divisors (see below), whose sum is σ = 20115456. Its totient is φ = 4948776.

The previous prime is 11640547. The next prime is 11640583. The reversal of 11640566 is 66504611.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (1257216).

Almost surely, 2^11640566 is an apocalyptic number.

11640566 is a deficient number, since it is larger than the sum of its proper divisors (8474890).

11640566 is a wasteful number, since it uses less digits than its factorization.

11640566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 11640566 is about 3411.8273696071. The cubic root of 11640566 is about 226.6338096357.

The spelling of 11640566 in words is "eleven million, six hundred forty thousand, five hundred sixty-six".