33666749 has 4 divisors (see below), whose sum is σ = 35647164. Its totient is φ = 31686336.

The previous prime is 33666739. The next prime is 33666761. The reversal of 33666749 is 94766633.

33666749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94766633 = 13 ⋅7289741.

It can be written as a sum of positive squares in 2 ways, for example, as 28408900 + 5257849 = 5330^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 33666749 - 2¹² = 33662653 is a prime.

It is a super-2 number, since 2×33666749² = 2266899976458002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33666739) 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 3 ways as a sum of consecutive naturals, for example, 990182 + ... + 990215.

It is an arithmetic number, because the mean of its divisors is an integer number (8911791).

Almost surely, 2^33666749 is an apocalyptic number.

It is an amenable number.

33666749 is a deficient number, since it is larger than the sum of its proper divisors (1980415).

33666749 is a wasteful number, since it uses less digits than its factorization.

33666749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980414.

The product of its digits is 489888, while the sum is 44.

The square root of 33666749 is about 5802.3054900617. The cubic root of 33666749 is about 322.8992679205.

The spelling of 33666749 in words is "thirty-three million, six hundred sixty-six thousand, seven hundred forty-nine".