660318747 has 8 divisors (see below), whose sum is σ = 960463680. Its totient is φ = 400193160.

The previous prime is 660318727. The next prime is 660318749. The reversal of 660318747 is 747813066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660318747 - 2¹⁹ = 659794459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660318699 and 660318708.

It is not an unprimeable number, because it can be changed into a prime (660318749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10004797 + ... + 10004862.

It is an arithmetic number, because the mean of its divisors is an integer number (120057960).

Almost surely, 2^660318747 is an apocalyptic number.

660318747 is a deficient number, since it is larger than the sum of its proper divisors (300144933).

660318747 is a wasteful number, since it uses less digits than its factorization.

660318747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009673.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 660318747 is about 25696.6680135772. The cubic root of 660318747 is about 870.7989081106.

The spelling of 660318747 in words is "six hundred sixty million, three hundred eighteen thousand, seven hundred forty-seven".