33661081 has 8 divisors (see below), whose sum is σ = 34317000. Its totient is φ = 33008640.

The previous prime is 33661079. The next prime is 33661091. The reversal of 33661081 is 18016633.

It can be written as a sum of positive squares in 4 ways, for example, as 7241481 + 26419600 = 2691^2 + 5140^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33661081 - 2¹ = 33661079 is a prime.

It is a super-2 number, since 2×33661081² = 2266136748177122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33661051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26775 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (4289625).

Almost surely, 2^33661081 is an apocalyptic number.

It is an amenable number.

33661081 is a deficient number, since it is larger than the sum of its proper divisors (655919).

33661081 is a wasteful number, since it uses less digits than its factorization.

33661081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 33661081 is about 5801.8170429616. The cubic root of 33661081 is about 322.8811462245.

The spelling of 33661081 in words is "thirty-three million, six hundred sixty-one thousand, eighty-one".