4406165906 has 4 divisors (see below), whose sum is σ = 6609248862. Its totient is φ = 2203082952.

The previous prime is 4406165903. The next prime is 4406165921. The reversal of 4406165906 is 6095616044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4132561225 + 273604681 = 64285^2 + 16541^2 .

It is not an unprimeable number, because it can be changed into a prime (4406165903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101541475 + ... + 1101541478.

Almost surely, 2^4406165906 is an apocalyptic number.

4406165906 is a deficient number, since it is larger than the sum of its proper divisors (2203082956).

4406165906 is a wasteful number, since it uses less digits than its factorization.

4406165906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203082955.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 4406165906 is about 66378.9568010827. The cubic root of 4406165906 is about 1639.4076169558.

The spelling of 4406165906 in words is "four billion, four hundred six million, one hundred sixty-five thousand, nine hundred six".