166071055551097 has 2 divisors, whose sum is σ = 166071055551098. Its totient is φ = 166071055551096.

The previous prime is 166071055551083. The next prime is 166071055551251. The reversal of 166071055551097 is 790155550170661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102436037702761 + 63635017848336 = 10121069^2 + 7977156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166071055551097 is a prime.

It is not a weakly prime, because it can be changed into another prime (166071055551007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83035527775548 + 83035527775549.

It is an arithmetic number, because the mean of its divisors is an integer number (83035527775549).

Almost surely, 2^{166071055551097} is an apocalyptic number.

It is an amenable number.

166071055551097 is a deficient number, since it is larger than the sum of its proper divisors (1).

166071055551097 is an equidigital number, since it uses as much as digits as its factorization.

166071055551097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9922500, while the sum is 58.

The spelling of 166071055551097 in words is "one hundred sixty-six trillion, seventy-one billion, fifty-five million, five hundred fifty-one thousand, ninety-seven".