33198663997 has 2 divisors, whose sum is σ = 33198663998. Its totient is φ = 33198663996.

The previous prime is 33198663977. The next prime is 33198664001. The reversal of 33198663997 is 79936689133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19240186681 + 13958477316 = 138709^2 + 118146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33198663997 is a prime.

It is a super-2 number, since 2×33198663997² (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 (33198663977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16599331998 + 16599331999.

It is an arithmetic number, because the mean of its divisors is an integer number (16599331999).

Almost surely, 2^33198663997 is an apocalyptic number.

It is an amenable number.

33198663997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33198663997 is an equidigital number, since it uses as much as digits as its factorization.

33198663997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 64.

The spelling of 33198663997 in words is "thirty-three billion, one hundred ninety-eight million, six hundred sixty-three thousand, nine hundred ninety-seven".