11605566 has 16 divisors (see below), whose sum is σ = 26527104. Its totient is φ = 3315864.

The previous prime is 11605553. The next prime is 11605579. The reversal of 11605566 is 66550611.

11605566 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11605553) and next prime (11605579).

11605566 is strictly pandigital in base 8.

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, 138120 + ... + 138203.

It is an arithmetic number, because the mean of its divisors is an integer number (1657944).

Almost surely, 2^11605566 is an apocalyptic number.

11605566 is an abundant number, since it is smaller than the sum of its proper divisors (14921538).

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

11605566 is a wasteful number, since it uses less digits than its factorization.

11605566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276335.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 11605566 is about 3406.6942921254. The cubic root of 11605566 is about 226.4064396317.

The spelling of 11605566 in words is "eleven million, six hundred five thousand, five hundred sixty-six".