660545360 has 80 divisors (see below), whose sum is σ = 1601576064. Its totient is φ = 253134336.

The previous prime is 660545359. The next prime is 660545381. The reversal of 660545360 is 63545066.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 660545360.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 180509 + ... + 184131.

Almost surely, 2^660545360 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660545360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800788032).

660545360 is an abundant number, since it is smaller than the sum of its proper divisors (941030704).

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

660545360 is a wasteful number, since it uses less digits than its factorization.

660545360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3726 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 660545360 is about 25701.0770202340. The cubic root of 660545360 is about 870.8985124224.

The spelling of 660545360 in words is "six hundred sixty million, five hundred forty-five thousand, three hundred sixty".