6689587133 has 4 divisors (see below), whose sum is σ = 6690612060. Its totient is φ = 6688562208.

The previous prime is 6689587097. The next prime is 6689587141. The reversal of 6689587133 is 3317859866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3317859866 = 2 ⋅1658929933.

It can be written as a sum of positive squares in 2 ways, for example, as 5190193849 + 1499393284 = 72043^2 + 38722^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689587133 - 2⁸ = 6689586877 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 (6689581133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502610 + ... + 515747.

It is an arithmetic number, because the mean of its divisors is an integer number (1672653015).

Almost surely, 2^6689587133 is an apocalyptic number.

It is an amenable number.

6689587133 is a deficient number, since it is larger than the sum of its proper divisors (1024927).

6689587133 is a wasteful number, since it uses less digits than its factorization.

6689587133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024926.

The product of its digits is 6531840, while the sum is 56.

The square root of 6689587133 is about 81789.8962769852. The cubic root of 6689587133 is about 1884.2264890785.

The spelling of 6689587133 in words is "six billion, six hundred eighty-nine million, five hundred eighty-seven thousand, one hundred thirty-three".