660225870 has 256 divisors, whose sum is σ = 1969228800. Its totient is φ = 156764160.

The previous prime is 660225869. The next prime is 660225887. The reversal of 660225870 is 78522066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9044154 + ... + 9044226.

It is an arithmetic number, because the mean of its divisors is an integer number (7692300).

Almost surely, 2^660225870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660225870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984614400).

660225870 is an abundant number, since it is smaller than the sum of its proper divisors (1309002930).

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

660225870 is a wasteful number, since it uses less digits than its factorization.

660225870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 660225870 is about 25694.8607702007. The cubic root of 660225870 is about 870.7580788481.

The spelling of 660225870 in words is "six hundred sixty million, two hundred twenty-five thousand, eight hundred seventy".