660228540 has 24 divisors (see below), whose sum is σ = 1848640080. Its totient is φ = 176060928.

The previous prime is 660228523. The next prime is 660228553. The reversal of 660228540 is 45822066.

It is a congruent number.

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, 5501845 + ... + 5501964.

It is an arithmetic number, because the mean of its divisors is an integer number (77026670).

Almost surely, 2^660228540 is an apocalyptic number.

660228540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660228540 is an abundant number, since it is smaller than the sum of its proper divisors (1188411540).

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

660228540 is a wasteful number, since it uses less digits than its factorization.

660228540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003821 (or 11003819 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 660228540 is about 25694.9127260631. The cubic root of 660228540 is about 870.7592526489.

The spelling of 660228540 in words is "six hundred sixty million, two hundred twenty-eight thousand, five hundred forty".