6699366720 has 168 divisors, whose sum is σ = 23255523720. Its totient is φ = 1770024960.

The previous prime is 6699366701. The next prime is 6699366727. The reversal of 6699366720 is 276639966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3323291904 + 3376074816 = 57648^2 + 58104^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699366727) 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 23 ways as a sum of consecutive naturals, for example, 303250 + ... + 324590.

Almost surely, 2^6699366720 is an apocalyptic number.

6699366720 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 6699366720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11627761860).

6699366720 is an abundant number, since it is smaller than the sum of its proper divisors (16556157000).

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

6699366720 is a wasteful number, since it uses less digits than its factorization.

6699366720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21473 (or 21460 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The square root of 6699366720 is about 81849.6592540250. The cubic root of 6699366720 is about 1885.1442330423.

The spelling of 6699366720 in words is "six billion, six hundred ninety-nine million, three hundred sixty-six thousand, seven hundred twenty".