33499969661 has 2 divisors, whose sum is σ = 33499969662. Its totient is φ = 33499969660.

The previous prime is 33499969651. The next prime is 33499969663. The reversal of 33499969661 is 16696999433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27904032025 + 5595937636 = 167045^2 + 74806^2 .

It is an emirp because it is prime and its reverse (16696999433) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33499969661 is a prime.

It is a super-2 number, since 2×33499969661² (a number of 22 digits) contains 22 as substring.

Together with 33499969663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33499969663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16749984830 + 16749984831.

It is an arithmetic number, because the mean of its divisors is an integer number (16749984831).

Almost surely, 2^33499969661 is an apocalyptic number.

It is an amenable number.

33499969661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33499969661 is an equidigital number, since it uses as much as digits as its factorization.

33499969661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51018336, while the sum is 65.

The spelling of 33499969661 in words is "thirty-three billion, four hundred ninety-nine million, nine hundred sixty-nine thousand, six hundred sixty-one".