166278542659 has 2 divisors, whose sum is σ = 166278542660. Its totient is φ = 166278542658.

The previous prime is 166278542627. The next prime is 166278542663. The reversal of 166278542659 is 956245872661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166278542659 - 2⁵ = 166278542627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166278542597 and 166278542606.

It is not a weakly prime, because it can be changed into another prime (166278546659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83139271329 + 83139271330.

It is an arithmetic number, because the mean of its divisors is an integer number (83139271330).

Almost surely, 2^166278542659 is an apocalyptic number.

166278542659 is a deficient number, since it is larger than the sum of its proper divisors (1).

166278542659 is an equidigital number, since it uses as much as digits as its factorization.

166278542659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 61.

The spelling of 166278542659 in words is "one hundred sixty-six billion, two hundred seventy-eight million, five hundred forty-two thousand, six hundred fifty-nine".