33525613661 has 2 divisors, whose sum is σ = 33525613662. Its totient is φ = 33525613660.

The previous prime is 33525613607. The next prime is 33525613673. The reversal of 33525613661 is 16631652533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28792999225 + 4732614436 = 169685^2 + 68794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33525613661 is a prime.

It is a super-2 number, since 2×33525613661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33525615661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16762806830 + 16762806831.

It is an arithmetic number, because the mean of its divisors is an integer number (16762806831).

Almost surely, 2^33525613661 is an apocalyptic number.

It is an amenable number.

33525613661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33525613661 is an equidigital number, since it uses as much as digits as its factorization.

33525613661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 41.

The spelling of 33525613661 in words is "thirty-three billion, five hundred twenty-five million, six hundred thirteen thousand, six hundred sixty-one".