170670720225661 has 2 divisors, whose sum is σ = 170670720225662. Its totient is φ = 170670720225660.

The previous prime is 170670720225631. The next prime is 170670720225673. The reversal of 170670720225661 is 166522027076071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164341374984900 + 6329345240761 = 12819570^2 + 2515819^2 .

It is a cyclic number.

It is not a de Polignac number, because 170670720225661 - 2²¹ = 170670718128509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 170670720225599 and 170670720225608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170670720225601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85335360112830 + 85335360112831.

It is an arithmetic number, because the mean of its divisors is an integer number (85335360112831).

Almost surely, 2^{170670720225661} is an apocalyptic number.

It is an amenable number.

170670720225661 is a deficient number, since it is larger than the sum of its proper divisors (1).

170670720225661 is an equidigital number, since it uses as much as digits as its factorization.

170670720225661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 170670720225661 in words is "one hundred seventy trillion, six hundred seventy billion, seven hundred twenty million, two hundred twenty-five thousand, six hundred sixty-one".