661230232 has 32 divisors (see below), whose sum is σ = 1413720000. Its totient is φ = 287230464.

The previous prime is 661230223. The next prime is 661230239. The reversal of 661230232 is 232032166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 661230197 and 661230206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661230239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185232 + ... + 188767.

It is an arithmetic number, because the mean of its divisors is an integer number (44178750).

Almost surely, 2^661230232 is an apocalyptic number.

It is an amenable number.

661230232 is an abundant number, since it is smaller than the sum of its proper divisors (752489768).

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

661230232 is a wasteful number, since it uses less digits than its factorization.

661230232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374035 (or 374031 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 661230232 is about 25714.3973680116. The cubic root of 661230232 is about 871.1993991445.

Adding to 661230232 its reverse (232032166), we get a palindrome (893262398).

The spelling of 661230232 in words is "six hundred sixty-one million, two hundred thirty thousand, two hundred thirty-two".