33336661 has 4 divisors (see below), whose sum is σ = 33450732. Its totient is φ = 33222592.

The previous prime is 33336623. The next prime is 33336727. The reversal of 33336661 is 16663333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16663333 = 47 ⋅354539.

It can be written as a sum of positive squares in 2 ways, for example, as 13140625 + 20196036 = 3625^2 + 4494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33336661 is a prime.

It is a super-2 number, since 2×33336661² = 2222665933257842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33336601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56596 + ... + 57181.

It is an arithmetic number, because the mean of its divisors is an integer number (8362683).

Almost surely, 2^33336661 is an apocalyptic number.

It is an amenable number.

33336661 is a deficient number, since it is larger than the sum of its proper divisors (114071).

33336661 is a wasteful number, since it uses less digits than its factorization.

33336661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114070.

The product of its digits is 17496, while the sum is 31.

The square root of 33336661 is about 5773.7908690911. The cubic root of 33336661 is about 321.8405039350.

Adding to 33336661 its reverse (16663333), we get a palindrome (49999994).

The spelling of 33336661 in words is "thirty-three million, three hundred thirty-six thousand, six hundred sixty-one".