326769661 has 2 divisors, whose sum is σ = 326769662. Its totient is φ = 326769660.

The previous prime is 326769649. The next prime is 326769721. The reversal of 326769661 is 166967623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326488761 + 280900 = 18069^2 + 530^2 .

It is an emirp because it is prime and its reverse (166967623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326769661 - 2¹³ = 326761469 is a prime.

It is a super-2 number, since 2×326769661² = 213556822700109842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326769601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163384830 + 163384831.

It is an arithmetic number, because the mean of its divisors is an integer number (163384831).

Almost surely, 2^326769661 is an apocalyptic number.

It is an amenable number.

326769661 is a deficient number, since it is larger than the sum of its proper divisors (1).

326769661 is an equidigital number, since it uses as much as digits as its factorization.

326769661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 326769661 is about 18076.7713101649. The cubic root of 326769661 is about 688.7800757615.

The spelling of 326769661 in words is "three hundred twenty-six million, seven hundred sixty-nine thousand, six hundred sixty-one".