10405666 has 8 divisors (see below), whose sum is σ = 16526700. Its totient is φ = 4896768.

The previous prime is 10405663. The next prime is 10405667. The reversal of 10405666 is 66650401.

10405666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10400625 + 5041 = 3225^2 + 71^2 .

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 (10405663) 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, 152991 + ... + 153058.

Almost surely, 2^10405666 is an apocalyptic number.

10405666 is a deficient number, since it is larger than the sum of its proper divisors (6121034).

10405666 is a wasteful number, since it uses less digits than its factorization.

10405666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306068.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 10405666 is about 3225.7814557096. The cubic root of 10405666 is about 218.3182093649.

The spelling of 10405666 in words is "ten million, four hundred five thousand, six hundred sixty-six".