660890208 has 96 divisors (see below), whose sum is σ = 1910563200. Its totient is φ = 198364160.

The previous prime is 660890207. The next prime is 660890213. The reversal of 660890208 is 802098066.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660890201) 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, 110068 + ... + 115916.

It is an arithmetic number, because the mean of its divisors is an integer number (19901700).

Almost surely, 2^660890208 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 660890208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955281600).

660890208 is an abundant number, since it is smaller than the sum of its proper divisors (1249672992).

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

660890208 is a wasteful number, since it uses less digits than its factorization.

660890208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980 (or 5972 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 660890208 is about 25707.7849687599. The cubic root of 660890208 is about 871.0500414366.

The spelling of 660890208 in words is "six hundred sixty million, eight hundred ninety thousand, two hundred eight".