660884680 has 16 divisors (see below), whose sum is σ = 1486990620. Its totient is φ = 264353856.

The previous prime is 660884669. The next prime is 660884723. The reversal of 660884680 is 86488066.

It can be written as a sum of positive squares in 2 ways, for example, as 611968644 + 48916036 = 24738^2 + 6994^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 660884680.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8261019 + ... + 8261098.

Almost surely, 2^660884680 is an apocalyptic number.

It is an amenable number.

660884680 is an abundant number, since it is smaller than the sum of its proper divisors (826105940).

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

660884680 is a wasteful number, since it uses less digits than its factorization.

660884680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16522128 (or 16522124 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 660884680 is about 25707.6774524654. The cubic root of 660884680 is about 871.0476128042.

The spelling of 660884680 in words is "six hundred sixty million, eight hundred eighty-four thousand, six hundred eighty".