6501661224 has 64 divisors (see below), whose sum is σ = 17132808000. Its totient is φ = 2050375680.

The previous prime is 6501661139. The next prime is 6501661249. The reversal of 6501661224 is 4221661056.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341394 + ... + 359934.

It is an arithmetic number, because the mean of its divisors is an integer number (267700125).

Almost surely, 2^6501661224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501661224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8566404000).

6501661224 is an abundant number, since it is smaller than the sum of its proper divisors (10631146776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6501661224 is a wasteful number, since it uses less digits than its factorization.

6501661224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19338 (or 19334 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 6501661224 is about 80632.8792987079. The cubic root of 6501661224 is about 1866.4145529973.

The spelling of 6501661224 in words is "six billion, five hundred one million, six hundred sixty-one thousand, two hundred twenty-four".