66118603 has 2 divisors, whose sum is σ = 66118604. Its totient is φ = 66118602.

The previous prime is 66118597. The next prime is 66118607. The reversal of 66118603 is 30681166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66118603 - 2¹³ = 66110411 is a prime.

It is not a weakly prime, because it can be changed into another prime (66118607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33059301 + 33059302.

It is an arithmetic number, because the mean of its divisors is an integer number (33059302).

Almost surely, 2^66118603 is an apocalyptic number.

66118603 is a deficient number, since it is larger than the sum of its proper divisors (1).

66118603 is an equidigital number, since it uses as much as digits as its factorization.

66118603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 66118603 is about 8131.3346382989. The cubic root of 66118603 is about 404.3659295225.

Adding to 66118603 its reverse (30681166), we get a palindrome (96799769).

The spelling of 66118603 in words is "sixty-six million, one hundred eighteen thousand, six hundred three".