661268300 has 144 divisors (see below), whose sum is σ = 1803717888. Its totient is φ = 204422400.

The previous prime is 661268297. The next prime is 661268317. The reversal of 661268300 is 3862166.

661268300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1208627 + ... + 1209173.

Almost surely, 2^661268300 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 661268300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901858944).

661268300 is an abundant number, since it is smaller than the sum of its proper divisors (1142449588).

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

661268300 is a wasteful number, since it uses less digits than its factorization.

661268300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 661268300 is about 25715.1375652552. The cubic root of 661268300 is about 871.2161175686.

The spelling of 661268300 in words is "six hundred sixty-one million, two hundred sixty-eight thousand, three hundred".