170998966861 has 2 divisors, whose sum is σ = 170998966862. Its totient is φ = 170998966860.

The previous prime is 170998966771. The next prime is 170998966891. The reversal of 170998966861 is 168669899071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101701036836 + 69297930025 = 318906^2 + 263245^2 .

It is a cyclic number.

It is not a de Polignac number, because 170998966861 - 2¹⁷ = 170998835789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170998966891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85499483430 + 85499483431.

It is an arithmetic number, because the mean of its divisors is an integer number (85499483431).

Almost surely, 2^170998966861 is an apocalyptic number.

It is an amenable number.

170998966861 is a deficient number, since it is larger than the sum of its proper divisors (1).

170998966861 is an equidigital number, since it uses as much as digits as its factorization.

170998966861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70543872, while the sum is 70.

The spelling of 170998966861 in words is "one hundred seventy billion, nine hundred ninety-eight million, nine hundred sixty-six thousand, eight hundred sixty-one".