33664563 has 12 divisors (see below), whose sum is σ = 50303760. Its totient is φ = 21668976.

The previous prime is 33664537. The next prime is 33664583. The reversal of 33664563 is 36546633.

It is a happy number.

33664563 is a `hidden beast` number, since 3 + 3 + 6 + 645 + 6 + 3 = 666.

It is not a de Polignac number, because 33664563 - 2⁵ = 33664531 is a prime.

It is a super-2 number, since 2×33664563² = 2266605603961938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33664583) 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 11 ways as a sum of consecutive naturals, for example, 64231 + ... + 64752.

It is an arithmetic number, because the mean of its divisors is an integer number (4191980).

Almost surely, 2^33664563 is an apocalyptic number.

33664563 is a deficient number, since it is larger than the sum of its proper divisors (16639197).

33664563 is a wasteful number, since it uses less digits than its factorization.

33664563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129018 (or 129015 counting only the distinct ones).

The product of its digits is 116640, while the sum is 36.

The square root of 33664563 is about 5802.1171136060. The cubic root of 33664563 is about 322.8922790952.

The spelling of 33664563 in words is "thirty-three million, six hundred sixty-four thousand, five hundred sixty-three".