33668690 has 32 divisors (see below), whose sum is σ = 66394944. Its totient is φ = 12191040.

The previous prime is 33668651. The next prime is 33668693. The reversal of 33668690 is 9686633.

It is a super-2 number, since 2×33668690² = 2267161372632200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33668693) 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, 33272 + ... + 34268.

It is an arithmetic number, because the mean of its divisors is an integer number (2074842).

Almost surely, 2^33668690 is an apocalyptic number.

33668690 is a deficient number, since it is larger than the sum of its proper divisors (32726254).

33668690 is a wasteful number, since it uses less digits than its factorization.

33668690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 33668690 is about 5802.4727487512. The cubic root of 33668690 is about 322.9054732066.

The spelling of 33668690 in words is "thirty-three million, six hundred sixty-eight thousand, six hundred ninety".