6649687224 has 256 divisors, whose sum is σ = 20120832000. Its totient is φ = 2052490752.

The previous prime is 6649687223. The next prime is 6649687337. The reversal of 6649687224 is 4227869466.

6649687224 is a `hidden beast` number, since 66 + 496 + 8 + 72 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (6967296) is a multiple of the sum of its prime divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649687223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23496987 + ... + 23497269.

It is an arithmetic number, because the mean of its divisors is an integer number (78597000).

Almost surely, 2^6649687224 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 6649687224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10060416000).

6649687224 is an abundant number, since it is smaller than the sum of its proper divisors (13471144776).

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

6649687224 is a wasteful number, since it uses less digits than its factorization.

6649687224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 384 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 6649687224 is about 81545.6143762496. The cubic root of 6649687224 is about 1880.4728725991.

The spelling of 6649687224 in words is "six billion, six hundred forty-nine million, six hundred eighty-seven thousand, two hundred twenty-four".