166670020995697 has 2 divisors, whose sum is σ = 166670020995698. Its totient is φ = 166670020995696.

The previous prime is 166670020995691. The next prime is 166670020995713. The reversal of 166670020995697 is 796599020076661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113944864854016 + 52725156141681 = 10674496^2 + 7261209^2 .

It is a cyclic number.

It is not a de Polignac number, because 166670020995697 - 2¹¹ = 166670020993649 is a prime.

It is not a weakly prime, because it can be changed into another prime (166670020995691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83335010497848 + 83335010497849.

It is an arithmetic number, because the mean of its divisors is an integer number (83335010497849).

Almost surely, 2^{166670020995697} is an apocalyptic number.

It is an amenable number.

166670020995697 is a deficient number, since it is larger than the sum of its proper divisors (1).

166670020995697 is an equidigital number, since it uses as much as digits as its factorization.

166670020995697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 462944160, while the sum is 73.

The spelling of 166670020995697 in words is "one hundred sixty-six trillion, six hundred seventy billion, twenty million, nine hundred ninety-five thousand, six hundred ninety-seven".