6605450989 has 4 divisors (see below), whose sum is σ = 6626967424. Its totient is φ = 6583934556.

The previous prime is 6605450927. The next prime is 6605450993. The reversal of 6605450989 is 9890545066.

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 a cyclic number.

It is not a de Polignac number, because 6605450989 - 2²⁷ = 6471233261 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 (6605450389) 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, 10757757 + ... + 10758370.

It is an arithmetic number, because the mean of its divisors is an integer number (1656741856).

Almost surely, 2^6605450989 is an apocalyptic number.

It is an amenable number.

6605450989 is a deficient number, since it is larger than the sum of its proper divisors (21516435).

6605450989 is a wasteful number, since it uses less digits than its factorization.

6605450989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21516434.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The square root of 6605450989 is about 81273.9256403922. The cubic root of 6605450989 is about 1876.2937194397.

The spelling of 6605450989 in words is "six billion, six hundred five million, four hundred fifty thousand, nine hundred eighty-nine".