660747547 has 16 divisors (see below), whose sum is σ = 702177280. Its totient is φ = 620848800.

The previous prime is 660747541. The next prime is 660747557. The reversal of 660747547 is 745747066.

660747547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 660747547 - 2³ = 660747539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660747497 and 660747506.

It is not an unprimeable number, because it can be changed into a prime (660747541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147178 + ... + 151600.

It is an arithmetic number, because the mean of its divisors is an integer number (43886080).

Almost surely, 2^660747547 is an apocalyptic number.

660747547 is a deficient number, since it is larger than the sum of its proper divisors (41429733).

660747547 is a wasteful number, since it uses less digits than its factorization.

660747547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594.

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 660747547 is about 25705.0101536646. The cubic root of 660747547 is about 870.9873614277.

The spelling of 660747547 in words is "six hundred sixty million, seven hundred forty-seven thousand, five hundred forty-seven".