6660724 has 12 divisors (see below), whose sum is σ = 13321504. Its totient is φ = 2854584.

The previous prime is 6660721. The next prime is 6660733. The reversal of 6660724 is 4270666.

6660724 = 317² + 318² + ... + 372².

6660724 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

6660724 is an admirable number.

It is an Ulam number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660721) 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 3 ways as a sum of consecutive naturals, for example, 118914 + ... + 118969.

Almost surely, 2^6660724 is an apocalyptic number.

It is an amenable number.

6660724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6660724 is a wasteful number, since it uses less digits than its factorization.

6660724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237894 (or 237892 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 6660724 is about 2580.8378484515. The cubic root of 6660724 is about 188.1512665171.

The spelling of 6660724 in words is "six million, six hundred sixty thousand, seven hundred twenty-four".