661344332 has 48 divisors (see below), whose sum is σ = 1305303552. Its totient is φ = 290594880.

The previous prime is 661344331. The next prime is 661344349. The reversal of 661344332 is 233443166.

It is not an unprimeable number, because it can be changed into a prime (661344331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169718 + ... + 173570.

It is an arithmetic number, because the mean of its divisors is an integer number (27193824).

Almost surely, 2^661344332 is an apocalyptic number.

It is an amenable number.

661344332 is a deficient number, since it is larger than the sum of its proper divisors (643959220).

661344332 is a wasteful number, since it uses less digits than its factorization.

661344332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998 (or 3996 counting only the distinct ones).

The product of its digits is 31104, while the sum is 32.

The square root of 661344332 is about 25716.6158737887. The cubic root of 661344332 is about 871.2495068224.

Adding to 661344332 its reverse (233443166), we get a palindrome (894787498).

The spelling of 661344332 in words is "six hundred sixty-one million, three hundred forty-four thousand, three hundred thirty-two".