33664372 has 18 divisors (see below), whose sum is σ = 68531442. Its totient is φ = 14427504.

The previous prime is 33664363. The next prime is 33664373. The reversal of 33664372 is 27346633.

It can be written as a sum of positive squares in only one way, i.e., 33593616 + 70756 = 5796^2 + 266^2 .

It is a super-2 number, since 2×33664372² = 2266579884308768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33664373) 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 5 ways as a sum of consecutive naturals, for example, 85683 + ... + 86074.

Almost surely, 2^33664372 is an apocalyptic number.

It is an amenable number.

33664372 is an abundant number, since it is smaller than the sum of its proper divisors (34867070).

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

33664372 is a wasteful number, since it uses less digits than its factorization.

33664372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171775 (or 171766 counting only the distinct ones).

The product of its digits is 54432, while the sum is 34.

The square root of 33664372 is about 5802.1006540735. The cubic root of 33664372 is about 322.8916684378.

The spelling of 33664372 in words is "thirty-three million, six hundred sixty-four thousand, three hundred seventy-two".