66140603 has 2 divisors, whose sum is σ = 66140604. Its totient is φ = 66140602.

The previous prime is 66140587. The next prime is 66140611. The reversal of 66140603 is 30604166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66140603 - 2⁴ = 66140587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66140623) 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, 33070301 + 33070302.

It is an arithmetic number, because the mean of its divisors is an integer number (33070302).

Almost surely, 2^66140603 is an apocalyptic number.

66140603 is a deficient number, since it is larger than the sum of its proper divisors (1).

66140603 is an equidigital number, since it uses as much as digits as its factorization.

66140603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66140603 is about 8132.6873172402. The cubic root of 66140603 is about 404.4107735026.

Adding to 66140603 its reverse (30604166), we get a palindrome (96744769).

The spelling of 66140603 in words is "sixty-six million, one hundred forty thousand, six hundred three".