33665772 has 48 divisors (see below), whose sum is σ = 90202112. Its totient is φ = 9573120.

The previous prime is 33665761. The next prime is 33665773. The reversal of 33665772 is 27756633.

It is a super-2 number, since 2×33665772² = 2266768408711968, 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 33665772.

It is not an unprimeable number, because it can be changed into a prime (33665773) 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 15 ways as a sum of consecutive naturals, for example, 19413 + ... + 21075.

Almost surely, 2^33665772 is an apocalyptic number.

It is an amenable number.

33665772 is an abundant number, since it is smaller than the sum of its proper divisors (56536340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33665772 is a wasteful number, since it uses less digits than its factorization.

33665772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its digits is 158760, while the sum is 39.

The square root of 33665772 is about 5802.2212987786. The cubic root of 33665772 is about 322.8961444070.

The spelling of 33665772 in words is "thirty-three million, six hundred sixty-five thousand, seven hundred seventy-two".