166888279 has 2 divisors, whose sum is σ = 166888280. Its totient is φ = 166888278.

The previous prime is 166888273. The next prime is 166888297. The reversal of 166888279 is 972888661.

Together with next prime (166888297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166888279 - 2⁷ = 166888151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166888273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83444139 + 83444140.

It is an arithmetic number, because the mean of its divisors is an integer number (83444140).

Almost surely, 2^166888279 is an apocalyptic number.

166888279 is a deficient number, since it is larger than the sum of its proper divisors (1).

166888279 is an equidigital number, since it uses as much as digits as its factorization.

166888279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The square root of 166888279 is about 12918.5246448656. The cubic root of 166888279 is about 550.5650160534.

The spelling of 166888279 in words is "one hundred sixty-six million, eight hundred eighty-eight thousand, two hundred seventy-nine".