4000660609 has 16 divisors (see below), whose sum is σ = 4654359360. Its totient is φ = 3398376960.

The previous prime is 4000660607. The next prime is 4000660663. The reversal of 4000660609 is 9060660004.

It is not a de Polignac number, because 4000660609 - 2¹ = 4000660607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000660603) 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 15 ways as a sum of consecutive naturals, for example, 50964 + ... + 102949.

It is an arithmetic number, because the mean of its divisors is an integer number (290897460).

Almost surely, 2^4000660609 is an apocalyptic number.

It is an amenable number.

4000660609 is a deficient number, since it is larger than the sum of its proper divisors (653698751).

4000660609 is a wasteful number, since it uses less digits than its factorization.

4000660609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154080.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 4000660609 is about 63250.7755604625. The cubic root of 4000660609 is about 1587.4884347763.

The spelling of 4000660609 in words is "four billion, six hundred sixty thousand, six hundred nine".