166568128154459 has 2 divisors, whose sum is σ = 166568128154460. Its totient is φ = 166568128154458.

The previous prime is 166568128154443. The next prime is 166568128154473. The reversal of 166568128154459 is 954451821865661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166568128154459 - 2⁴ = 166568128154443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166568128154392 and 166568128154401.

It is not a weakly prime, because it can be changed into another prime (166568128154429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83284064077229 + 83284064077230.

It is an arithmetic number, because the mean of its divisors is an integer number (83284064077230).

Almost surely, 2^{166568128154459} is an apocalyptic number.

166568128154459 is a deficient number, since it is larger than the sum of its proper divisors (1).

166568128154459 is an equidigital number, since it uses as much as digits as its factorization.

166568128154459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664000, while the sum is 71.

The spelling of 166568128154459 in words is "one hundred sixty-six trillion, five hundred sixty-eight billion, one hundred twenty-eight million, one hundred fifty-four thousand, four hundred fifty-nine".