33666542 has 32 divisors (see below), whose sum is σ = 62741952. Its totient is φ = 13192704.

The previous prime is 33666491. The next prime is 33666547. The reversal of 33666542 is 24566633.

33666542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33666542² = 2266872100475528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33666547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19748 + ... + 21384.

It is an arithmetic number, because the mean of its divisors is an integer number (1960686).

Almost surely, 2^33666542 is an apocalyptic number.

33666542 is a deficient number, since it is larger than the sum of its proper divisors (29075410).

33666542 is a wasteful number, since it uses less digits than its factorization.

33666542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its digits is 77760, while the sum is 35.

The square root of 33666542 is about 5802.2876522972. The cubic root of 33666542 is about 322.8986061371.

Subtracting from 33666542 its reverse (24566633), we obtain a palindrome (9099909).

The spelling of 33666542 in words is "thirty-three million, six hundred sixty-six thousand, five hundred forty-two".