660889817448 has 64 divisors (see below), whose sum is σ = 1914851819520. Its totient is φ = 186166142400.

The previous prime is 660889817347. The next prime is 660889817449. The reversal of 660889817448 is 844718988066.

It is not an unprimeable number, because it can be changed into a prime (660889817449) 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, 27691368 + ... + 27715223.

It is an arithmetic number, because the mean of its divisors is an integer number (29919559680).

Almost surely, 2^660889817448 is an apocalyptic number.

It is an amenable number.

660889817448 is an abundant number, since it is smaller than the sum of its proper divisors (1253962002072).

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

660889817448 is a wasteful number, since it uses less digits than its factorization.

660889817448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55406678 (or 55406674 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 69.

The spelling of 660889817448 in words is "six hundred sixty billion, eight hundred eighty-nine million, eight hundred seventeen thousand, four hundred forty-eight".