660502100 has 72 divisors (see below), whose sum is σ = 1460974200. Its totient is φ = 259153920.

The previous prime is 660502099. The next prime is 660502121. The reversal of 660502100 is 1205066.

660502100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 194546704 + 465955396 = 13948^2 + 21586^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1445072 + ... + 1445528.

Almost surely, 2^660502100 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 660502100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730487100).

660502100 is an abundant number, since it is smaller than the sum of its proper divisors (800472100).

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

660502100 is a wasteful number, since it uses less digits than its factorization.

660502100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 660502100 is about 25700.2354074822. The cubic root of 660502100 is about 870.8794999041.

Adding to 660502100 its reverse (1205066), we get a palindrome (661707166).

The spelling of 660502100 in words is "six hundred sixty million, five hundred two thousand, one hundred".