33668421 has 8 divisors (see below), whose sum is σ = 45986304. Its totient is φ = 21898080.

The previous prime is 33668419. The next prime is 33668429. The reversal of 33668421 is 12486633.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33668421 - 2¹ = 33668419 is a prime.

It is a super-2 number, since 2×33668421² = 2267125145266482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33668429) 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 7 ways as a sum of consecutive naturals, for example, 136741 + ... + 136986.

It is an arithmetic number, because the mean of its divisors is an integer number (5748288).

Almost surely, 2^33668421 is an apocalyptic number.

It is an amenable number.

33668421 is a deficient number, since it is larger than the sum of its proper divisors (12317883).

33668421 is a wasteful number, since it uses less digits than its factorization.

33668421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273771.

The product of its digits is 20736, while the sum is 33.

The square root of 33668421 is about 5802.4495689321. The cubic root of 33668421 is about 322.9046132405.

The spelling of 33668421 in words is "thirty-three million, six hundred sixty-eight thousand, four hundred twenty-one".