3309661 has 2 divisors, whose sum is σ = 3309662. Its totient is φ = 3309660.

The previous prime is 3309659. The next prime is 3309673. The reversal of 3309661 is 1669033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3308761 + 900 = 1819^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 3309661 - 2¹ = 3309659 is a prime.

Together with 3309659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3309461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1654830 + 1654831.

It is an arithmetic number, because the mean of its divisors is an integer number (1654831).

Almost surely, 2^3309661 is an apocalyptic number.

It is an amenable number.

3309661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3309661 is an equidigital number, since it uses as much as digits as its factorization.

3309661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 3309661 is about 1819.2473718546. The cubic root of 3309661 is about 149.0257001147.

The spelling of 3309661 in words is "three million, three hundred nine thousand, six hundred sixty-one".