66125133613 has 8 divisors (see below), whose sum is σ = 82441725120. Its totient is φ = 51526078080.

The previous prime is 66125133611. The next prime is 66125133671. The reversal of 66125133613 is 31633152166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66125133613 - 2¹ = 66125133611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66125133611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429383908 + ... + 429384061.

It is an arithmetic number, because the mean of its divisors is an integer number (10305215640).

Almost surely, 2^66125133613 is an apocalyptic number.

It is an amenable number.

66125133613 is a deficient number, since it is larger than the sum of its proper divisors (16316591507).

66125133613 is a wasteful number, since it uses less digits than its factorization.

66125133613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858767987.

The product of its digits is 58320, while the sum is 37.

Adding to 66125133613 its reverse (31633152166), we get a palindrome (97758285779).

The spelling of 66125133613 in words is "sixty-six billion, one hundred twenty-five million, one hundred thirty-three thousand, six hundred thirteen".