6687172800 has 1008 divisors, whose sum is σ = 30620159232. Its totient is φ = 1343692800.

The previous prime is 6687172771. The next prime is 6687172847. The reversal of 6687172800 is 82717866.

It is a tau number, because it is divible by the number of its divisors (1008).

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

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 41025519 + ... + 41025681.

Almost surely, 2^6687172800 is an apocalyptic number.

6687172800 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 6687172800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15310079616).

6687172800 is an abundant number, since it is smaller than the sum of its proper divisors (23932986432).

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

6687172800 is a wasteful number, since it uses less digits than its factorization.

6687172800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 6687172800 is about 81775.1355853355. The cubic root of 6687172800 is about 1883.9997836288. Note that the first 3 decimals are identical.

The spelling of 6687172800 in words is "six billion, six hundred eighty-seven million, one hundred seventy-two thousand, eight hundred".