11405666 has 8 divisors (see below), whose sum is σ = 17343084. Its totient is φ = 5624640.

The previous prime is 11405663. The next prime is 11405699. The reversal of 11405666 is 66650411.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 42025 = 3371^2 + 205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11405663) 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, 38915 + ... + 39206.

Almost surely, 2^11405666 is an apocalyptic number.

11405666 is a deficient number, since it is larger than the sum of its proper divisors (5937418).

11405666 is an equidigital number, since it uses as much as digits as its factorization.

11405666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78196.

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

The square root of 11405666 is about 3377.2275611809. The cubic root of 11405666 is about 225.0989918317.

The spelling of 11405666 in words is "eleven million, four hundred five thousand, six hundred sixty-six".