660623340603 has 16 divisors (see below), whose sum is σ = 893389305600. Its totient is φ = 434138580960.

The previous prime is 660623340581. The next prime is 660623340617. The reversal of 660623340603 is 306043326066.

It is not a de Polignac number, because 660623340603 - 2¹⁷ = 660623209531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660623340683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003893 + ... + 1526121.

It is an arithmetic number, because the mean of its divisors is an integer number (55836831600).

Almost surely, 2^660623340603 is an apocalyptic number.

660623340603 is a deficient number, since it is larger than the sum of its proper divisors (232765964997).

660623340603 is a wasteful number, since it uses less digits than its factorization.

660623340603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528242.

The product of its (nonzero) digits is 279936, while the sum is 39.

Adding to 660623340603 its reverse (306043326066), we get a palindrome (966666666669).

The spelling of 660623340603 in words is "six hundred sixty billion, six hundred twenty-three million, three hundred forty thousand, six hundred three".