33664144 has 20 divisors (see below), whose sum is σ = 65741824. Its totient is φ = 16698528.

The previous prime is 33664139. The next prime is 33664151. The reversal of 33664144 is 44146633.

It is a happy number.

It is a super-2 number, since 2×33664144² = 2266549182505472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6252 + ... + 10315.

Almost surely, 2^33664144 is an apocalyptic number.

It is an amenable number.

33664144 is a deficient number, since it is larger than the sum of its proper divisors (32077680).

33664144 is a wasteful number, since it uses less digits than its factorization.

33664144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16702 (or 16696 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 33664144 is about 5802.0810059840. The cubic root of 33664144 is about 322.8909394825.

The spelling of 33664144 in words is "thirty-three million, six hundred sixty-four thousand, one hundred forty-four".