33668645 has 16 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 26030400.

The previous prime is 33668641. The next prime is 33668651. The reversal of 33668645 is 54686633.

It is not a de Polignac number, because 33668645 - 2² = 33668641 is a prime.

It is a super-2 number, since 2×33668645² = 2267155312272050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33668641) 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, 17060 + ... + 18930.

It is an arithmetic number, because the mean of its divisors is an integer number (2611440).

Almost surely, 2^33668645 is an apocalyptic number.

It is an amenable number.

33668645 is a deficient number, since it is larger than the sum of its proper divisors (8114395).

33668645 is a wasteful number, since it uses less digits than its factorization.

33668645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its digits is 311040, while the sum is 41.

The square root of 33668645 is about 5802.4688710927. The cubic root of 33668645 is about 322.9053293464.

The spelling of 33668645 in words is "thirty-three million, six hundred sixty-eight thousand, six hundred forty-five".