661344322 has 8 divisors (see below), whose sum is σ = 992851596. Its totient is φ = 330393792.

The previous prime is 661344317. The next prime is 661344331. The reversal of 661344322 is 223443166.

It can be written as a sum of positive squares in 2 ways, for example, as 602653401 + 58690921 = 24549^2 + 7661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136203 + ... + 140974.

Almost surely, 2^661344322 is an apocalyptic number.

661344322 is a deficient number, since it is larger than the sum of its proper divisors (331507274).

661344322 is a wasteful number, since it uses less digits than its factorization.

661344322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278372.

The product of its digits is 20736, while the sum is 31.

The square root of 661344322 is about 25716.6156793619. The cubic root of 661344322 is about 871.2495024311.

Adding to 661344322 its reverse (223443166), we get a palindrome (884787488).

The spelling of 661344322 in words is "six hundred sixty-one million, three hundred forty-four thousand, three hundred twenty-two".