660888480 has 144 divisors (see below), whose sum is σ = 2421770400. Its totient is φ = 151054848.

The previous prime is 660888467. The next prime is 660888493. The reversal of 660888480 is 84888066.

It is an interprime number because it is at equal distance from previous prime (660888467) and next prime (660888493).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9471 + ... + 37569.

It is an arithmetic number, because the mean of its divisors is an integer number (16817850).

Almost surely, 2^660888480 is an apocalyptic number.

660888480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660888480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1210885200).

660888480 is an abundant number, since it is smaller than the sum of its proper divisors (1760881920).

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

660888480 is a wasteful number, since it uses less digits than its factorization.

660888480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28131 (or 28116 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The square root of 660888480 is about 25707.7513602415. The cubic root of 660888480 is about 871.0492822708.

The spelling of 660888480 in words is "six hundred sixty million, eight hundred eighty-eight thousand, four hundred eighty".