166290563 has 2 divisors, whose sum is σ = 166290564. Its totient is φ = 166290562.

The previous prime is 166290493. The next prime is 166290587. The reversal of 166290563 is 365092661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166290563 - 2¹⁶ = 166225027 is a prime.

It is not a weakly prime, because it can be changed into another prime (166290863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83145281 + 83145282.

It is an arithmetic number, because the mean of its divisors is an integer number (83145282).

Almost surely, 2^166290563 is an apocalyptic number.

166290563 is a deficient number, since it is larger than the sum of its proper divisors (1).

166290563 is an equidigital number, since it uses as much as digits as its factorization.

166290563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 166290563 is about 12895.3698279654. The cubic root of 166290563 is about 549.9069407292.

The spelling of 166290563 in words is "one hundred sixty-six million, two hundred ninety thousand, five hundred sixty-three".