661441732 has 12 divisors (see below), whose sum is σ = 1322883520. Its totient is φ = 283475016.

The previous prime is 661441723. The next prime is 661441733. The reversal of 661441732 is 237144166.

661441732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

661441732 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (661441733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11811432 + ... + 11811487.

Almost surely, 2^661441732 is an apocalyptic number.

It is an amenable number.

661441732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661441732 is a wasteful number, since it uses less digits than its factorization.

661441732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23622930 (or 23622928 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 661441732 is about 25718.5095213545. The cubic root of 661441732 is about 871.2922760387.

Adding to 661441732 its reverse (237144166), we get a palindrome (898585898).

It can be divided in two parts, 66144 and 1732, that added together give a palindrome (67876).

The spelling of 661441732 in words is "six hundred sixty-one million, four hundred forty-one thousand, seven hundred thirty-two".