6651723120 has 80 divisors (see below), whose sum is σ = 23566110720. Its totient is φ = 1520393472.

The previous prime is 6651723079. The next prime is 6651723163. The reversal of 6651723120 is 213271566.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1978000 + ... + 1981359.

It is an arithmetic number, because the mean of its divisors is an integer number (294576384).

Almost surely, 2^6651723120 is an apocalyptic number.

6651723120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6651723120 is an abundant number, since it is smaller than the sum of its proper divisors (16914387600).

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

6651723120 is a wasteful number, since it uses less digits than its factorization.

6651723120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959382 (or 3959376 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 6651723120 is about 81558.0965937779. The cubic root of 6651723120 is about 1880.6647641586.

Adding to 6651723120 its reverse (213271566), we get a palindrome (6864994686).

The spelling of 6651723120 in words is "six billion, six hundred fifty-one million, seven hundred twenty-three thousand, one hundred twenty".