4006406666 has 16 divisors (see below), whose sum is σ = 6254992800. Its totient is φ = 1922257008.

The previous prime is 4006406611. The next prime is 4006406669. The reversal of 4006406666 is 6666046004.

It is not an unprimeable number, because it can be changed into a prime (4006406669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202436 + ... + 221343.

It is an arithmetic number, because the mean of its divisors is an integer number (390937050).

Almost surely, 2^4006406666 is an apocalyptic number.

4006406666 is a deficient number, since it is larger than the sum of its proper divisors (2248586134).

4006406666 is a wasteful number, since it uses less digits than its factorization.

4006406666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423973.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 4006406666 is about 63296.1820807543. The cubic root of 4006406666 is about 1588.2480955976.

The spelling of 4006406666 in words is "four billion, six million, four hundred six thousand, six hundred sixty-six".