660225544 has 32 divisors (see below), whose sum is σ = 1379203200. Its totient is φ = 293715520.

The previous prime is 660225523. The next prime is 660225551. The reversal of 660225544 is 445522066.

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, 75679 + ... + 83950.

It is an arithmetic number, because the mean of its divisors is an integer number (43100100).

Almost surely, 2^660225544 is an apocalyptic number.

It is an amenable number.

660225544 is an abundant number, since it is smaller than the sum of its proper divisors (718977656).

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

660225544 is a wasteful number, since it uses less digits than its factorization.

660225544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159693 (or 159689 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 660225544 is about 25694.8544265189. The cubic root of 660225544 is about 870.7579355299.

The spelling of 660225544 in words is "six hundred sixty million, two hundred twenty-five thousand, five hundred forty-four".