6686693573 has 4 divisors (see below), whose sum is σ = 7641935520. Its totient is φ = 5731451628.

The previous prime is 6686693557. The next prime is 6686693581. The reversal of 6686693573 is 3753966866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6686693573 - 2⁴ = 6686693557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686693173) 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 3 ways as a sum of consecutive naturals, for example, 477620963 + ... + 477620976.

It is an arithmetic number, because the mean of its divisors is an integer number (1910483880).

Almost surely, 2^6686693573 is an apocalyptic number.

It is an amenable number.

6686693573 is a deficient number, since it is larger than the sum of its proper divisors (955241947).

6686693573 is an equidigital number, since it uses as much as digits as its factorization.

6686693573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955241946.

The product of its digits is 29393280, while the sum is 59.

The square root of 6686693573 is about 81772.2053817799. The cubic root of 6686693573 is about 1883.9547778065.

The spelling of 6686693573 in words is "six billion, six hundred eighty-six million, six hundred ninety-three thousand, five hundred seventy-three".