6665503939 has 8 divisors (see below), whose sum is σ = 7058728800. Its totient is φ = 6272405376.

The previous prime is 6665503931. The next prime is 6665503961. The reversal of 6665503939 is 9393055666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6665503939 - 2³ = 6665503931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665503931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90637 + ... + 146785.

It is an arithmetic number, because the mean of its divisors is an integer number (882341100).

Almost surely, 2^6665503939 is an apocalyptic number.

6665503939 is a deficient number, since it is larger than the sum of its proper divisors (393224861).

6665503939 is a wasteful number, since it uses less digits than its factorization.

6665503939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63149.

The product of its (nonzero) digits is 3936600, while the sum is 52.

The square root of 6665503939 is about 81642.5375585546. The cubic root of 6665503939 is about 1881.9626345377.

The spelling of 6665503939 in words is "six billion, six hundred sixty-five million, five hundred three thousand, nine hundred thirty-nine".