660897472 has 56 divisors (see below), whose sum is σ = 1371051360. Its totient is φ = 315678720.

The previous prime is 660897451. The next prime is 660897493. The reversal of 660897472 is 274798066.

660897472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (660897451) and next prime (660897493).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178197 + ... + 181867.

It is an arithmetic number, because the mean of its divisors is an integer number (24483060).

Almost surely, 2^660897472 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 660897472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685525680).

660897472 is an abundant number, since it is smaller than the sum of its proper divisors (710153888).

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

660897472 is a wasteful number, since it uses less digits than its factorization.

660897472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 660897472 is about 25707.9262485328. The cubic root of 660897472 is about 871.0532327303.

The spelling of 660897472 in words is "six hundred sixty million, eight hundred ninety-seven thousand, four hundred seventy-two".