166583563 has 2 divisors, whose sum is σ = 166583564. Its totient is φ = 166583562.

The previous prime is 166583551. The next prime is 166583567. The reversal of 166583563 is 365385661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166583563 is a prime.

It is not a weakly prime, because it can be changed into another prime (166583567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83291781 + 83291782.

It is an arithmetic number, because the mean of its divisors is an integer number (83291782).

Almost surely, 2^166583563 is an apocalyptic number.

166583563 is a deficient number, since it is larger than the sum of its proper divisors (1).

166583563 is an equidigital number, since it uses as much as digits as its factorization.

166583563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 166583563 is about 12906.7254948728. The cubic root of 166583563 is about 550.2297255219.

The spelling of 166583563 in words is "one hundred sixty-six million, five hundred eighty-three thousand, five hundred sixty-three".