660528747 has 12 divisors (see below), whose sum is σ = 967167864. Its totient is φ = 434319840.

The previous prime is 660528721. The next prime is 660528751. The reversal of 660528747 is 747825066.

It is not a de Polignac number, because 660528747 - 2¹² = 660524651 is a prime.

It is a super-2 number, since 2×660528747² = 872596451226780018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660524747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502029 + ... + 503342.

It is an arithmetic number, because the mean of its divisors is an integer number (80597322).

Almost surely, 2^660528747 is an apocalyptic number.

660528747 is a deficient number, since it is larger than the sum of its proper divisors (306639117).

660528747 is a wasteful number, since it uses less digits than its factorization.

660528747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005450 (or 1005447 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 660528747 is about 25700.7538216294. The cubic root of 660528747 is about 870.8912112037.

The spelling of 660528747 in words is "six hundred sixty million, five hundred twenty-eight thousand, seven hundred forty-seven".