6651187320 has 32 divisors (see below), whose sum is σ = 19953562320. Its totient is φ = 1773649920.

The previous prime is 6651187297. The next prime is 6651187327. The reversal of 6651187320 is 237811566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651187327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27713161 + ... + 27713400.

Almost surely, 2^6651187320 is an apocalyptic number.

6651187320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6651187320 is an abundant number, since it is smaller than the sum of its proper divisors (13302375000).

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

6651187320 is a wasteful number, since it uses less digits than its factorization.

6651187320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55426575 (or 55426571 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 6651187320 is about 81554.8117525876. The cubic root of 6651187320 is about 1880.6142666048.

Adding to 6651187320 its reverse (237811566), we get a palindrome (6888998886).

The spelling of 6651187320 in words is "six billion, six hundred fifty-one million, one hundred eighty-seven thousand, three hundred twenty".