3206212661 has 2 divisors, whose sum is σ = 3206212662. Its totient is φ = 3206212660.

The previous prime is 3206212657. The next prime is 3206212679. The reversal of 3206212661 is 1662126023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2683861636 + 522351025 = 51806^2 + 22855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3206212661 - 2² = 3206212657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3206212601) 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, 1603106330 + 1603106331.

It is an arithmetic number, because the mean of its divisors is an integer number (1603106331).

Almost surely, 2^3206212661 is an apocalyptic number.

It is an amenable number.

3206212661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3206212661 is an equidigital number, since it uses as much as digits as its factorization.

3206212661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3206212661 is about 56623.4285521462. The cubic root of 3206212661 is about 1474.5656345805.

Adding to 3206212661 its reverse (1662126023), we get a palindrome (4868338684).

The spelling of 3206212661 in words is "three billion, two hundred six million, two hundred twelve thousand, six hundred sixty-one".