166661310414259 has 2 divisors, whose sum is σ = 166661310414260. Its totient is φ = 166661310414258.

The previous prime is 166661310414253. The next prime is 166661310414341. The reversal of 166661310414259 is 952414013166661.

It is a weak prime.

It is an emirp because it is prime and its reverse (952414013166661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166661310414259 - 2³ = 166661310414251 is a prime.

It is not a weakly prime, because it can be changed into another prime (166661310414251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83330655207129 + 83330655207130.

It is an arithmetic number, because the mean of its divisors is an integer number (83330655207130).

Almost surely, 2^{166661310414259} is an apocalyptic number.

166661310414259 is a deficient number, since it is larger than the sum of its proper divisors (1).

166661310414259 is an equidigital number, since it uses as much as digits as its factorization.

166661310414259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 166661310414259 in words is "one hundred sixty-six trillion, six hundred sixty-one billion, three hundred ten million, four hundred fourteen thousand, two hundred fifty-nine".