33664541 has 4 divisors (see below), whose sum is σ = 33973500. Its totient is φ = 33355584.

The previous prime is 33664537. The next prime is 33664583. The reversal of 33664541 is 14546633.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14546633 = 131 ⋅111043.

It can be written as a sum of positive squares in 2 ways, for example, as 18957316 + 14707225 = 4354^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 33664541 - 2² = 33664537 is a prime.

It is a super-2 number, since 2×33664541² = 2266602641481362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33664498 and 33664507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33664531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154316 + ... + 154533.

It is an arithmetic number, because the mean of its divisors is an integer number (8493375).

Almost surely, 2^33664541 is an apocalyptic number.

It is an amenable number.

33664541 is a deficient number, since it is larger than the sum of its proper divisors (308959).

33664541 is a wasteful number, since it uses less digits than its factorization.

33664541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308958.

The product of its digits is 25920, while the sum is 32.

The square root of 33664541 is about 5802.1152177460. The cubic root of 33664541 is about 322.8922087578.

The spelling of 33664541 in words is "thirty-three million, six hundred sixty-four thousand, five hundred forty-one".