33397666223813 has 2 divisors, whose sum is σ = 33397666223814. Its totient is φ = 33397666223812.

The previous prime is 33397666223687. The next prime is 33397666223989. The reversal of 33397666223813 is 31832266679333.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32590602957124 + 807063266689 = 5708818^2 + 898367^2 .

It is a cyclic number.

It is not a de Polignac number, because 33397666223813 - 2³⁴ = 33380486354629 is a prime.

It is a super-2 number, since 2×33397666223813² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33397666223513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16698833111906 + 16698833111907.

It is an arithmetic number, because the mean of its divisors is an integer number (16698833111907).

Almost surely, 2^{33397666223813} is an apocalyptic number.

It is an amenable number.

33397666223813 is a deficient number, since it is larger than the sum of its proper divisors (1).

33397666223813 is an equidigital number, since it uses as much as digits as its factorization.

33397666223813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105815808, while the sum is 62.

The spelling of 33397666223813 in words is "thirty-three trillion, three hundred ninety-seven billion, six hundred sixty-six million, two hundred twenty-three thousand, eight hundred thirteen".