6699720 has 64 divisors (see below), whose sum is σ = 20759040. Its totient is φ = 1728000.

The previous prime is 6699703. The next prime is 6699727. The reversal of 6699720 is 279966.

It is not an unprimeable number, because it can be changed into a prime (6699727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2820 + ... + 4620.

It is an arithmetic number, because the mean of its divisors is an integer number (324360).

Almost surely, 2^6699720 is an apocalyptic number.

6699720 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 6699720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10379520).

6699720 is an abundant number, since it is smaller than the sum of its proper divisors (14059320).

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

6699720 is a wasteful number, since it uses less digits than its factorization.

6699720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 6699720 is about 2588.3817338252. The cubic root of 6699720 is about 188.5177369112.

The spelling of 6699720 in words is "six million, six hundred ninety-nine thousand, seven hundred twenty".