33685336661 has 2 divisors, whose sum is σ = 33685336662. Its totient is φ = 33685336660.

The previous prime is 33685336651. The next prime is 33685336679. The reversal of 33685336661 is 16663358633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28842568561 + 4842768100 = 169831^2 + 69590^2 .

It is a cyclic number.

It is not a de Polignac number, because 33685336661 - 2³⁴ = 16505467477 is a prime.

It is a super-2 number, since 2×33685336661² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33685336651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16842668330 + 16842668331.

It is an arithmetic number, because the mean of its divisors is an integer number (16842668331).

Almost surely, 2^33685336661 is an apocalyptic number.

It is an amenable number.

33685336661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33685336661 is an equidigital number, since it uses as much as digits as its factorization.

33685336661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 50.

The spelling of 33685336661 in words is "thirty-three billion, six hundred eighty-five million, three hundred thirty-six thousand, six hundred sixty-one".