6620002609 has 4 divisors (see below), whose sum is σ = 7221821040. Its totient is φ = 6018184180.

The previous prime is 6620002537. The next prime is 6620002633. The reversal of 6620002609 is 9062000266.

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 6620002609 - 2⁷ = 6620002481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6620002679) 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, 300909199 + ... + 300909220.

It is an arithmetic number, because the mean of its divisors is an integer number (1805455260).

Almost surely, 2^6620002609 is an apocalyptic number.

It is an amenable number.

6620002609 is a deficient number, since it is larger than the sum of its proper divisors (601818431).

6620002609 is a wasteful number, since it uses less digits than its factorization.

6620002609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601818430.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6620002609 is about 81363.3984602413. The cubic root of 6620002609 is about 1877.6705160902.

The spelling of 6620002609 in words is "six billion, six hundred twenty million, two thousand, six hundred nine".