6616722409 has 32 divisors (see below), whose sum is σ = 7672320000. Its totient is φ = 5647340160.

The previous prime is 6616722377. The next prime is 6616722421. The reversal of 6616722409 is 9042276166.

It is a happy number.

It is not a de Polignac number, because 6616722409 - 2⁵ = 6616722377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616726409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4413342 + ... + 4414840.

It is an arithmetic number, because the mean of its divisors is an integer number (239760000).

Almost surely, 2^6616722409 is an apocalyptic number.

It is an amenable number.

6616722409 is a deficient number, since it is larger than the sum of its proper divisors (1055597591).

6616722409 is a wasteful number, since it uses less digits than its factorization.

6616722409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 6616722409 is about 81343.2382500230. The cubic root of 6616722409 is about 1877.3603373410.

The spelling of 6616722409 in words is "six billion, six hundred sixteen million, seven hundred twenty-two thousand, four hundred nine".