6688741500 has 432 divisors, whose sum is σ = 24932945856. Its totient is φ = 1478304000.

The previous prime is 6688741483. The next prime is 6688741519. The reversal of 6688741500 is 51478866.

It is a happy number.

6688741500 is a `hidden beast` number, since 6 + 68 + 87 + 4 + 1 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 143 ways as a sum of consecutive naturals, for example, 109651470 + ... + 109651530.

Almost surely, 2^6688741500 is an apocalyptic number.

6688741500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688741500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12466472928).

6688741500 is an abundant number, since it is smaller than the sum of its proper divisors (18244204356).

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

6688741500 is a wasteful number, since it uses less digits than its factorization.

6688741500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 6688741500 is about 81784.7265692073. The cubic root of 6688741500 is about 1884.1470904943.

The spelling of 6688741500 in words is "six billion, six hundred eighty-eight million, seven hundred forty-one thousand, five hundred".