170002661 has 2 divisors, whose sum is σ = 170002662. Its totient is φ = 170002660.

The previous prime is 170002649. The next prime is 170002663. The reversal of 170002661 is 166200071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106481761 + 63520900 = 10319^2 + 7970^2 .

It is an emirp because it is prime and its reverse (166200071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170002661 - 2⁶ = 170002597 is a prime.

Together with 170002663, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9503204 and since 170002661 and 9503204 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170002663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85001330 + 85001331.

It is an arithmetic number, because the mean of its divisors is an integer number (85001331).

Almost surely, 2^170002661 is an apocalyptic number.

It is an amenable number.

170002661 is a deficient number, since it is larger than the sum of its proper divisors (1).

170002661 is an equidigital number, since it uses as much as digits as its factorization.

170002661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 170002661 is about 13038.5068546977. The cubic root of 170002661 is about 553.9687160585.

The spelling of 170002661 in words is "one hundred seventy million, two thousand, six hundred sixty-one".