166567563803 has 2 divisors, whose sum is σ = 166567563804. Its totient is φ = 166567563802.

The previous prime is 166567563769. The next prime is 166567563817. The reversal of 166567563803 is 308365765661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166567563803 - 2¹⁰ = 166567562779 is a prime.

It is a super-2 number, since 2×166567563803² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166567563703) 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, 83283781901 + 83283781902.

It is an arithmetic number, because the mean of its divisors is an integer number (83283781902).

Almost surely, 2^166567563803 is an apocalyptic number.

166567563803 is a deficient number, since it is larger than the sum of its proper divisors (1).

166567563803 is an equidigital number, since it uses as much as digits as its factorization.

166567563803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 166567563803 in words is "one hundred sixty-six billion, five hundred sixty-seven million, five hundred sixty-three thousand, eight hundred three".