66450604172203 has 2 divisors, whose sum is σ = 66450604172204. Its totient is φ = 66450604172202.

The previous prime is 66450604172123. The next prime is 66450604172207. The reversal of 66450604172203 is 30227140605466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66450604172203 - 2³⁷ = 66313165218731 is a prime.

It is not a weakly prime, because it can be changed into another prime (66450604172207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33225302086101 + 33225302086102.

It is an arithmetic number, because the mean of its divisors is an integer number (33225302086102).

Almost surely, 2^{66450604172203} is an apocalyptic number.

66450604172203 is a deficient number, since it is larger than the sum of its proper divisors (1).

66450604172203 is an equidigital number, since it uses as much as digits as its factorization.

66450604172203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 46.

Adding to 66450604172203 its reverse (30227140605466), we get a palindrome (96677744777669).

The spelling of 66450604172203 in words is "sixty-six trillion, four hundred fifty billion, six hundred four million, one hundred seventy-two thousand, two hundred three".