6660747 has 12 divisors (see below), whose sum is σ = 9687600. Its totient is φ = 4409808.

The previous prime is 6660733. The next prime is 6660751. The reversal of 6660747 is 7470666.

It is a de Polignac number, because none of the positive numbers 2^k-6660747 is a prime.

6660747 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6660707) 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 11 ways as a sum of consecutive naturals, for example, 1143 + ... + 3824.

It is an arithmetic number, because the mean of its divisors is an integer number (807300).

Almost surely, 2^6660747 is an apocalyptic number.

6660747 is a deficient number, since it is larger than the sum of its proper divisors (3026853).

6660747 is a wasteful number, since it uses less digits than its factorization.

6660747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122 (or 5119 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 6660747 is about 2580.8423043650. The cubic root of 6660747 is about 188.1514830838.

The spelling of 6660747 in words is "six million, six hundred sixty thousand, seven hundred forty-seven".