17066981 has 2 divisors, whose sum is σ = 17066982. Its totient is φ = 17066980.

The previous prime is 17066941. The next prime is 17066983. The reversal of 17066981 is 18966071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 1934881 = 3890^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 17066981 - 2¹⁰ = 17065957 is a prime.

It is a super-2 number, since 2×17066981² = 582563680908722, which contains 22 as substring.

Together with 17066983, 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 (17066983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8533490 + 8533491.

It is an arithmetic number, because the mean of its divisors is an integer number (8533491).

Almost surely, 2^17066981 is an apocalyptic number.

It is an amenable number.

17066981 is a deficient number, since it is larger than the sum of its proper divisors (1).

17066981 is an equidigital number, since it uses as much as digits as its factorization.

17066981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 17066981 is about 4131.2202797721. The cubic root of 17066981 is about 257.4654165388.

The spelling of 17066981 in words is "seventeen million, sixty-six thousand, nine hundred eighty-one".