6690587709 has 32 divisors (see below), whose sum is σ = 10169470080. Its totient is φ = 3882832128.

The previous prime is 6690587693. The next prime is 6690587731. The reversal of 6690587709 is 9077850966.

It is not a de Polignac number, because 6690587709 - 2⁴ = 6690587693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690587209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20154 + ... + 117419.

It is an arithmetic number, because the mean of its divisors is an integer number (317795940).

Almost surely, 2^6690587709 is an apocalyptic number.

It is an amenable number.

6690587709 is a deficient number, since it is larger than the sum of its proper divisors (3478882371).

6690587709 is a wasteful number, since it uses less digits than its factorization.

6690587709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137661.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The square root of 6690587709 is about 81796.0127940232. The cubic root of 6690587709 is about 1884.3204270041.

The spelling of 6690587709 in words is "six billion, six hundred ninety million, five hundred eighty-seven thousand, seven hundred nine".