6651189216 has 72 divisors (see below), whose sum is σ = 21616371504. Its totient is φ = 1900339200.

The previous prime is 6651189187. The next prime is 6651189241. The reversal of 6651189216 is 6129811566.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1647585 + ... + 1651616.

It is an arithmetic number, because the mean of its divisors is an integer number (300227382).

Almost surely, 2^6651189216 is an apocalyptic number.

It is an amenable number.

6651189216 is an abundant number, since it is smaller than the sum of its proper divisors (14965182288).

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

6651189216 is a wasteful number, since it uses less digits than its factorization.

6651189216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299224 (or 3299213 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 6651189216 is about 81554.8233766710. The cubic root of 6651189216 is about 1880.6144453019.

The spelling of 6651189216 in words is "six billion, six hundred fifty-one million, one hundred eighty-nine thousand, two hundred sixteen".