33040661 has 2 divisors, whose sum is σ = 33040662. Its totient is φ = 33040660.

The previous prime is 33040633. The next prime is 33040663. The reversal of 33040661 is 16604033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 7980625 = 5006^2 + 2825^2 .

It is an emirp because it is prime and its reverse (16604033) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33040661 is a prime.

Together with 33040663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33040663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16520330 + 16520331.

It is an arithmetic number, because the mean of its divisors is an integer number (16520331).

Almost surely, 2^33040661 is an apocalyptic number.

It is an amenable number.

33040661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33040661 is an equidigital number, since it uses as much as digits as its factorization.

33040661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 33040661 is about 5748.1006428211. The cubic root of 33040661 is about 320.8851178720.

Adding to 33040661 its reverse (16604033), we get a palindrome (49644694).

The spelling of 33040661 in words is "thirty-three million, forty thousand, six hundred sixty-one".