166610005165523 has 2 divisors, whose sum is σ = 166610005165524. Its totient is φ = 166610005165522.

The previous prime is 166610005165427. The next prime is 166610005165543. The reversal of 166610005165523 is 325561500016661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166610005165523 - 2²⁸ = 166609736730067 is a prime.

It is not a weakly prime, because it can be changed into another prime (166610005165543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83305002582761 + 83305002582762.

It is an arithmetic number, because the mean of its divisors is an integer number (83305002582762).

Almost surely, 2^{166610005165523} is an apocalyptic number.

166610005165523 is a deficient number, since it is larger than the sum of its proper divisors (1).

166610005165523 is an equidigital number, since it uses as much as digits as its factorization.

166610005165523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 166610005165523 in words is "one hundred sixty-six trillion, six hundred ten billion, five million, one hundred sixty-five thousand, five hundred twenty-three".