660008435328 has 576 divisors, whose sum is σ = 2235147183360. Its totient is φ = 193516646400.

The previous prime is 660008435309. The next prime is 660008435341. The reversal of 660008435328 is 823534800066.

It is a happy number.

660008435328 is a `hidden beast` number, since 6 + 600 + 0 + 8 + 4 + 3 + 5 + 32 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×660008435328² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 116668276 + ... + 116673932.

It is an arithmetic number, because the mean of its divisors is an integer number (3880463860).

Almost surely, 2^660008435328 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 660008435328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1117573591680).

660008435328 is an abundant number, since it is smaller than the sum of its proper divisors (1575138748032).

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

660008435328 is a wasteful number, since it uses less digits than its factorization.

660008435328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739 (or 5704 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 660008435328 in words is "six hundred sixty billion, eight million, four hundred thirty-five thousand, three hundred twenty-eight".