33664401 has 12 divisors (see below), whose sum is σ = 48681360. Its totient is φ = 22417560.

The previous prime is 33664391. The next prime is 33664427. The reversal of 33664401 is 10446633.

It is not a de Polignac number, because 33664401 - 2¹⁷ = 33533329 is a prime.

It is a super-2 number, since 2×33664401² = 2266583789377602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33664441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9846 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (4056780).

Almost surely, 2^33664401 is an apocalyptic number.

It is an amenable number.

33664401 is a deficient number, since it is larger than the sum of its proper divisors (15016959).

33664401 is a wasteful number, since it uses less digits than its factorization.

33664401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 33664401 is about 5802.1031531678. The cubic root of 33664401 is about 322.8917611556.

The spelling of 33664401 in words is "thirty-three million, six hundred sixty-four thousand, four hundred one".