322645661 has 8 divisors (see below), whose sum is σ = 356856024. Its totient is φ = 289776960.

The previous prime is 322645621. The next prime is 322645663. The reversal of 322645661 is 166546223.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26977636 + 295668025 = 5194^2 + 17195^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 322645661 - 2⁶ = 322645597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322645663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334910 + ... + 335871.

It is an arithmetic number, because the mean of its divisors is an integer number (44607003).

Almost surely, 2^322645661 is an apocalyptic number.

It is an amenable number.

322645661 is a deficient number, since it is larger than the sum of its proper divisors (34210363).

322645661 is a wasteful number, since it uses less digits than its factorization.

322645661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670831.

The product of its digits is 51840, while the sum is 35.

The square root of 322645661 is about 17962.3400758364. The cubic root of 322645661 is about 685.8702144633.

The spelling of 322645661 in words is "three hundred twenty-two million, six hundred forty-five thousand, six hundred sixty-one".