33664013 has 4 divisors (see below), whose sum is σ = 33740448. Its totient is φ = 33587580.

The previous prime is 33664003. The next prime is 33664039. The reversal of 33664013 is 31046633.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33664013 - 2⁴ = 33663997 is a prime.

It is a super-2 number, since 2×33664013² = 2266531542528338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33664003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37553 + ... + 38438.

It is an arithmetic number, because the mean of its divisors is an integer number (8435112).

Almost surely, 2^33664013 is an apocalyptic number.

It is an amenable number.

33664013 is a deficient number, since it is larger than the sum of its proper divisors (76435).

33664013 is an equidigital number, since it uses as much as digits as its factorization.

33664013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76434.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 33664013 is about 5802.0697169200. The cubic root of 33664013 is about 322.8905206515.

The spelling of 33664013 in words is "thirty-three million, six hundred sixty-four thousand, thirteen".