3280661 has 2 divisors, whose sum is σ = 3280662. Its totient is φ = 3280660.

The previous prime is 3280657. The next prime is 3280663. The reversal of 3280661 is 1660823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 1575025 = 1306^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 3280661 - 2² = 3280657 is a prime.

Together with 3280663, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3280661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3280663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640330 + 1640331.

It is an arithmetic number, because the mean of its divisors is an integer number (1640331).

Almost surely, 2^3280661 is an apocalyptic number.

It is an amenable number.

3280661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3280661 is an equidigital number, since it uses as much as digits as its factorization.

3280661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3280661 is about 1811.2595065313. The cubic root of 3280661 is about 148.5891569346.

The spelling of 3280661 in words is "three million, two hundred eighty thousand, six hundred sixty-one".