661233200 has 30 divisors (see below), whose sum is σ = 1588613724. Its totient is φ = 264493120.

The previous prime is 661233191. The next prime is 661233211. The reversal of 661233200 is 2332166.

661233200 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 5 ways as a sum of consecutive naturals, for example, 826142 + ... + 826941.

Almost surely, 2^661233200 is an apocalyptic number.

It is an amenable number.

661233200 is an abundant number, since it is smaller than the sum of its proper divisors (927380524).

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

661233200 is a wasteful number, since it uses less digits than its factorization.

661233200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653101 (or 1653090 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 661233200 is about 25714.4550788073. The cubic root of 661233200 is about 871.2007026320.

Adding to 661233200 its reverse (2332166), we get a palindrome (663565366).

The spelling of 661233200 in words is "six hundred sixty-one million, two hundred thirty-three thousand, two hundred".