166475807 has 2 divisors, whose sum is σ = 166475808. Its totient is φ = 166475806.

The previous prime is 166475801. The next prime is 166475857. The reversal of 166475807 is 708574661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166475807 - 2¹⁰ = 166474783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166475801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83237903 + 83237904.

It is an arithmetic number, because the mean of its divisors is an integer number (83237904).

Almost surely, 2^166475807 is an apocalyptic number.

166475807 is a deficient number, since it is larger than the sum of its proper divisors (1).

166475807 is an equidigital number, since it uses as much as digits as its factorization.

166475807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 166475807 is about 12902.5504067994. The cubic root of 166475807 is about 550.1110596662. Note that the first 3 decimals are identical.

The spelling of 166475807 in words is "one hundred sixty-six million, four hundred seventy-five thousand, eight hundred seven".