66534203 has 2 divisors, whose sum is σ = 66534204. Its totient is φ = 66534202.

The previous prime is 66534163. The next prime is 66534227. The reversal of 66534203 is 30243566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66534203 - 2⁸ = 66533947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66534253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33267101 + 33267102.

It is an arithmetic number, because the mean of its divisors is an integer number (33267102).

Almost surely, 2^66534203 is an apocalyptic number.

66534203 is a deficient number, since it is larger than the sum of its proper divisors (1).

66534203 is an equidigital number, since it uses as much as digits as its factorization.

66534203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 66534203 is about 8156.8500660488. The cubic root of 66534203 is about 405.2113980455.

Adding to 66534203 its reverse (30243566), we get a palindrome (96777769).

The spelling of 66534203 in words is "sixty-six million, five hundred thirty-four thousand, two hundred three".