6609540493 has 4 divisors (see below), whose sum is σ = 6610587228. Its totient is φ = 6608493760.

The previous prime is 6609540491. The next prime is 6609540533. The reversal of 6609540493 is 3940459066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2034641449 + 4574899044 = 45107^2 + 67638^2 .

It is a cyclic number.

It is not a de Polignac number, because 6609540493 - 2¹ = 6609540491 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 (6609540491) 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, 513838 + ... + 526543.

It is an arithmetic number, because the mean of its divisors is an integer number (1652646807).

Almost surely, 2^6609540493 is an apocalyptic number.

It is an amenable number.

6609540493 is a deficient number, since it is larger than the sum of its proper divisors (1046735).

6609540493 is a wasteful number, since it uses less digits than its factorization.

6609540493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046734.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 6609540493 is about 81299.0805175557. The cubic root of 6609540493 is about 1876.6808505999.

The spelling of 6609540493 in words is "six billion, six hundred nine million, five hundred forty thousand, four hundred ninety-three".