322506661 has 4 divisors (see below), whose sum is σ = 322591500. Its totient is φ = 322421824.

The previous prime is 322506659. The next prime is 322506683. The reversal of 322506661 is 166605223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166605223 = 1873 ⋅88951.

It can be written as a sum of positive squares in 2 ways, for example, as 173422561 + 149084100 = 13169^2 + 12210^2 .

It is a cyclic number.

It is not a de Polignac number, because 322506661 - 2¹ = 322506659 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 (322506601) 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, 36436 + ... + 44413.

It is an arithmetic number, because the mean of its divisors is an integer number (80647875).

Almost surely, 2^322506661 is an apocalyptic number.

It is an amenable number.

322506661 is a deficient number, since it is larger than the sum of its proper divisors (84839).

322506661 is an equidigital number, since it uses as much as digits as its factorization.

322506661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84838.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 322506661 is about 17958.4704526861. The cubic root of 322506661 is about 685.7717063419.

The spelling of 322506661 in words is "three hundred twenty-two million, five hundred six thousand, six hundred sixty-one".