33684661 has 2 divisors, whose sum is σ = 33684662. Its totient is φ = 33684660.

The previous prime is 33684653. The next prime is 33684671. The reversal of 33684661 is 16648633.

33684661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31979025 + 1705636 = 5655^2 + 1306^2 .

It is an emirp because it is prime and its reverse (16648633) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33684661 - 2³ = 33684653 is a prime.

It is a super-2 number, since 2×33684661² = 2269312773369842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33684661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33684671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16842330 + 16842331.

It is an arithmetic number, because the mean of its divisors is an integer number (16842331).

Almost surely, 2^33684661 is an apocalyptic number.

It is an amenable number.

33684661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33684661 is an equidigital number, since it uses as much as digits as its factorization.

33684661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 33684661 is about 5803.8488091955. The cubic root of 33684661 is about 322.9565226939.

The spelling of 33684661 in words is "thirty-three million, six hundred eighty-four thousand, six hundred sixty-one".