4065609994 has 8 divisors (see below), whose sum is σ = 6103429668. Its totient is φ = 2031133440.

The previous prime is 4065609971. The next prime is 4065610009. The reversal of 4065609994 is 4999065604.

It can be written as a sum of positive squares in 2 ways, for example, as 3821094225 + 244515769 = 61815^2 + 15637^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832737 + ... + 837604.

Almost surely, 2^4065609994 is an apocalyptic number.

4065609994 is a deficient number, since it is larger than the sum of its proper divisors (2037819674).

4065609994 is a wasteful number, since it uses less digits than its factorization.

4065609994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671560.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The square root of 4065609994 is about 63762.1360526763. The cubic root of 4065609994 is about 1596.0331411158.

The spelling of 4065609994 in words is "four billion, sixty-five million, six hundred nine thousand, nine hundred ninety-four".