6705720 has 128 divisors (see below), whose sum is σ = 25574400. Its totient is φ = 1531008.

The previous prime is 6705697. The next prime is 6705731. The reversal of 6705720 is 275076.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7117 + ... + 8003.

It is an arithmetic number, because the mean of its divisors is an integer number (199800).

Almost surely, 2^6705720 is an apocalyptic number.

6705720 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 6705720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12787200).

6705720 is an abundant number, since it is smaller than the sum of its proper divisors (18868680).

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

6705720 is a wasteful number, since it uses less digits than its factorization.

6705720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 6705720 is about 2589.5404997798. The cubic root of 6705720 is about 188.5739964231.

The spelling of 6705720 in words is "six million, seven hundred five thousand, seven hundred twenty".