6665787825 has 12 divisors (see below), whose sum is σ = 11020769328. Its totient is φ = 3555086800.

The previous prime is 6665787811. The next prime is 6665787827. The reversal of 6665787825 is 5287875666.

It is not a de Polignac number, because 6665787825 - 2⁴ = 6665787809 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6665787827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44438511 + ... + 44438660.

It is an arithmetic number, because the mean of its divisors is an integer number (918397444).

Almost surely, 2^6665787825 is an apocalyptic number.

It is an amenable number.

6665787825 is a deficient number, since it is larger than the sum of its proper divisors (4354981503).

6665787825 is a wasteful number, since it uses less digits than its factorization.

6665787825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88877184 (or 88877179 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 60.

The square root of 6665787825 is about 81644.2761312757. The cubic root of 6665787825 is about 1881.9893519605.

The spelling of 6665787825 in words is "six billion, six hundred sixty-five million, seven hundred eighty-seven thousand, eight hundred twenty-five".