66935213445 has 16 divisors (see below), whose sum is σ = 107503558272. Its totient is φ = 35563041600.

The previous prime is 66935213413. The next prime is 66935213447. The reversal of 66935213445 is 54431253966.

It is not a de Polignac number, because 66935213445 - 2⁵ = 66935213413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66935213394 and 66935213403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66935213447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8479606 + ... + 8487495.

It is an arithmetic number, because the mean of its divisors is an integer number (6718972392).

Almost surely, 2^66935213445 is an apocalyptic number.

It is an amenable number.

66935213445 is a deficient number, since it is larger than the sum of its proper divisors (40568344827).

66935213445 is a wasteful number, since it uses less digits than its factorization.

66935213445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16967372.

The product of its digits is 2332800, while the sum is 48.

It can be divided in two parts, 6693521 and 3445, that added together give a palindrome (6696966).

The spelling of 66935213445 in words is "sixty-six billion, nine hundred thirty-five million, two hundred thirteen thousand, four hundred forty-five".