66305145532603 has 16 divisors (see below), whose sum is σ = 69269855086656. Its totient is φ = 63347296636800.

The previous prime is 66305145532537. The next prime is 66305145532627. The reversal of 66305145532603 is 30623554150366.

It is a cyclic number.

It is not a de Polignac number, because 66305145532603 - 2¹³ = 66305145524411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66305145532303) 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, 77608653 + ... + 78458353.

It is an arithmetic number, because the mean of its divisors is an integer number (4329365942916).

Almost surely, 2^{66305145532603} is an apocalyptic number.

66305145532603 is a deficient number, since it is larger than the sum of its proper divisors (2964709554053).

66305145532603 is a wasteful number, since it uses less digits than its factorization.

66305145532603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853734.

The product of its (nonzero) digits is 5832000, while the sum is 49.

Adding to 66305145532603 its reverse (30623554150366), we get a palindrome (96928699682969).

The spelling of 66305145532603 in words is "sixty-six trillion, three hundred five billion, one hundred forty-five million, five hundred thirty-two thousand, six hundred three".