33661806 has 24 divisors (see below), whose sum is σ = 71058024. Its totient is φ = 10629360.

The previous prime is 33661783. The next prime is 33661807. The reversal of 33661806 is 60816633.

It is a super-2 number, since 2×33661806² = 2266234366363272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33661807) 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 11 ways as a sum of consecutive naturals, for example, 5605 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (2960751).

Almost surely, 2^33661806 is an apocalyptic number.

33661806 is an abundant number, since it is smaller than the sum of its proper divisors (37396218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33661806 is a wasteful number, since it uses less digits than its factorization.

33661806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15584 (or 15565 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 33661806 is about 5801.8795230511. The cubic root of 33661806 is about 322.8834643037.

The spelling of 33661806 in words is "thirty-three million, six hundred sixty-one thousand, eight hundred six".